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[Notes] - Amazing Trigonometric Identities Cheat-sheet
[Notes] - Amazing Trigonometric Identities Cheat-sheet
Hope this helps. Smiling Face with Open Mouth and Tightly-closed Eyes
padre   2953   10 Replies
A year ago
Tips to solving first-degree equations
Tips to solving first-degree equations
1. Eliminate any fractions by multiplying both sides by a common denominator.

2. Remove any parentheses by performing the indicated multiplication.

3. Get all terms containing x on one side of the equal sign, and all other terms
bio_man   889   1 Reply
A year ago
[Software] - Virtual TI Calculator Software (TI-83, 92, etc).
[Software] - Virtual TI Calculator Software (TI-83, 92, etc).
Very rare software, hope you'll enjoy it.
duddy   1370   1 Reply
5 years ago
Posting guidelines for mathematics questions.
Posting guidelines for mathematics questions.
Hi,
Post any of your maths queries that you have in this board.

Mark the topic as solved once you have got the correct answer/explanation for it. It helps other people browsing the forums to know that the particular question is solved
BearPro   3610   N/A
5 years ago
"38% of adults in the United States regularly visit a​ doctor". This conclusion was ...
"38% of adults in the United States regularly visit a​ doctor". This conclusion was ...
"38% of adults in the United States regularly visit a​ doctor". This conclusion was reached by a college student after she had questioned 520 randomly selected members of her college. What is wrong with her​ survey?
stacybell2   24   1 Reply
3 days ago
In a survey of 1,000 television viewers
In a survey of 1,000 television viewers
In a survey of 1,000 television viewers, 40% said they watch network news programs. For a 99% confidence level, the margin of error for this estimate is 3.99%. If we only want to be 90% confident, how will the margin of error change?

      
blahhumbug   29   1 Reply
A week ago
In a poll of 553 voters in a certain city,
In a poll of 553 voters in a certain city,
In a poll of 553 voters in a certain city, 64% said that they backed a bill that would limit growth and development in their city. The margin of error in the poll was reported as 4 percentage points (with a 95% degree of confidence). Make a statement
blahhumbug   25   1 Reply
A week ago
A lumber mill is tested for consistency
A lumber mill is tested for consistency
A lumber mill is tested for consistency by measuring the variance of board thickness. The target accuracy is a variance of 0.0035 square inches or less. If 30 measurements are made and their variance is 0.006 square inches, is there enough evidence t
blahhumbug   26   1 Reply
A week ago
A bond analyst is analyzing the interest rates for equivalent municipal bonds
A bond analyst is analyzing the interest rates for equivalent municipal bonds
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states. At a = 0.05, is there enough evidence to conclude that there is a difference in the interest rates paid by the two states?
State A 
blahhumbug   47   1 Reply
Easy
A week ago
For a given level of significance, increasing the sample size will ____________________ the ...
For a given level of significance, increasing the sample size will ____________________ the ...

For a given level of significance, increasing the sample size will ____________________ the probability of committing a Type I error.

      
sometimes increase

      
always decrease

      
always increase
blahhumbug   44   1 Reply
A week ago
A study investigated the association between being a parent and suffering from anxiety among women ...
A study investigated the association between being a parent and suffering from anxiety among women ...
A study investigated the association between being a parent and suffering from anxiety among women aged 30-50. A researcher randomly selected 832 women with children and 518 women without children and asked each woman whether she suffered from anxiet
blahhumbug   54   N/A
Hard
A week ago
A college believes that 22% of applicants to that school have parents who have remarried. How large
A college believes that 22% of applicants to that school have parents who have remarried. How large
A college believes that 22% of applicants to that school have parents who have remarried. How large a sample is needed to estimate the true proportion of students who have parents who have remarried to within 5 percentage points with 99% confidence?
blahhumbug   47   1 Reply
A week ago
Stats II Question Help
Stats II Question Help
Twelve dieters lost an average of 9.8 pounds in 6 weeks when given a special diet plus a "fat-blocking" herbal formula. A control group of twelve other dieters were given the same diet, but without the herbal formula, and lost an average of
blahhumbug   50   1 Reply
2 weeks ago
An investor wants to compare the risks associated with two different stocks. One way to measure the
An investor wants to compare the risks associated with two different stocks. One way to measure the
What is the procedure/formula for solving this problem?
Post Merge: 3 weeks ago

An investor wants to compare the risks associated with two different stocks. One way to measure the risk of a given stock
tgrant0311   41   2 Replies
3 weeks ago
Statistics II multiple regression equation question
Statistics II multiple regression equation question
In a multiple regression equation, two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows.

b1 = 2.676   Sb1 = 0.56
b2 = -0.880   Sb2 = 0.71
 
Condu
jgosset2   51   1 Reply
A month ago
Statistics II regression equation
Statistics II regression equation
Cincinnati Paint Company sells quality brands of paints through hardware stores throughout the United States. The company maintains a large sales force whose job it is to call on existing customers as well as look for new business. The national sales
jgosset2   62   5 Replies
A month ago
Statistics II- multiple regression analysis
Statistics II- multiple regression analysis
Cellulon, a manufacturer of home insulation, wants to develop guidelines for builders and consumers on how the thickness of the insulation in the attic of a home and the outdoor temperature affect natural gas consumption. In the laboratory, it varied
jgosset2   32   1 Reply
A month ago
Statistics II multiple regression question
Statistics II multiple regression question
In a multiple regression equation, k = 5 and n = 20, the MSE value is 5.10, and SS total is 519.68. At the .05 significance level, can we conclude that any of the regression coefficients are not equal to 0? (Round your answers to 2 decimal places.)
jgosset2   36   1 Reply
A month ago
Statistics II correlation question
Statistics II correlation question
A study of 8 worldwide financial institutions showed the correlation between their assets and pretax profit to be .76.
 
1. State the decision rule for .010 significance level: H0: ρ ≤ 0; H1: ρ > 0 (Round your answer to 3 decimal places.
jgosset2   25   1 Reply
A month ago
Statistics II question: correlation and regression
Statistics II question: correlation and regression
Emily Smith decides to buy a fuel-efficient used car. Here are several vehicles she is considering, with the estimated cost to purchase and the age of the vehicle.
 
Vehicle   Estimated Cost   Age
  Honda Insight   $   5,555      8&nbs
jgosset2   37   2 Replies
A month ago
Statistics for Business II Question
Statistics for Business II Question
As part of an annual review of its accounts, a discount brokerage selects a random sample of 36 customers. Their accounts are reviewed for total account valuation, which showed a mean of $32,000, with a sample standard deviation of $8,200.
 
jgosset2   86   3 Replies
A month ago
The Engineering Department at Sims Software Inc. recently developed two chemical solutions designed ...
The Engineering Department at Sims Software Inc. recently developed two chemical solutions designed ...

The Engineering Department at Sims Software Inc. recently developed two chemical solutions designed to increase the usable life of computer disks. A sample of disks treated with the first solution lasted 86, 78, 66, 83, 84, 81, 84, 109, 65, and
jgosset2   42   2 Replies
A month ago
Business Statistics II: What is the probability...
Business Statistics II: What is the probability...
An economist uses the price of a gallon of milk as a measure of inflation. She finds that the average price is $3.50 per gallon and the population standard deviation is $0.33. You decide to sample 40 convenience stores, collect their prices for a gal
jgosset2   87   9 Replies
Hard
A month ago
Statistics for Business: What is the probability at least two students will fail?
Statistics for Business: What is the probability at least two students will fail?
It is estimated that 10% of those taking the quantitative methods portion of the CPA examination fail that section. Sixty students are taking the exam this Saturday. (Use the normal approximation to the binomial distribution.)

What is the
jgosset2   49   2 Replies
A month ago
In 2015, Netflix subscribers spent an average of 1.5 hours per day streaming content. To determine ...
In 2015, Netflix subscribers spent an average of 1.5 hours per day streaming content. To determine ...
In 2015, Netflix subscribers spent an average of 1.5 hours per day streaming content. To determine if there is an increase in viewing, suppose a new survey was conducted of subscribers. Of the 354 people who responded to the survey, an average of 1.6
garymiller28602   190   1 Reply
A month ago
Consider randomly selecting a student at a certain university, and let A denote the event that the ...
Consider randomly selecting a student at a certain university, and let A denote the event that the ...
Consider randomly selecting a student at a certain university, and let A denote the event that the selected individual has a Visa credit card and B be the analogous event for a MasterCard. Suppose that P(A) = 0.1, P(B) = 0.6, and P(A ? B) = 0.05.

ca
ogyno84   733   1 Reply
A month ago
In February 2002 the Argentine peso lost 70% of its value compared to the United States dollar. This ...
In February 2002 the Argentine peso lost 70% of its value compared to the United States dollar. This ...
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be us
Stevbo   129   1 Reply
2 months ago
Problems on Trigonometric Equations.
Problems on Trigonometric Equations.
Solve for 'X'  [0°<_X<_180°]
sin X+ sin 2X+ sin 3X=0
acharya123   2068   1 Reply
2 months ago
Demonstrate how a central projection can transform parallel lines into intersecting lines.
Demonstrate how a central projection can transform parallel lines into intersecting lines.
18.   Demonstrate how a central projection can transform paral- lel lines into intersecting lines.
 
Answer
mjvictor13   268   1 Reply
2 months ago
Brahmagupta asserts that if AB C D is a quadrilateral in- scribe
Brahmagupta asserts that if AB C D is a quadrilateral in- scribe
can you solve this problem.
Brahmagupta   asserts   that   if   AB C D   is   a   quadrilateral   in- scribed in a circle, as in Exercise 7, then if s = 1 (a +
2 b + c + d), the area of the quadrilat
mjvictor13   141   1 Reply
2 months ago
Show that the odds against at least one 1 appearing in a throw of three dice are
Show that the odds against at least one 1 appearing in a throw of three dice are
Show that the odds against at least one 1 appearing in a throw of three dice are 125:91.
mjvictor13   117   1 Reply
2 months ago
Show that 3, 5, 6, are in the subcontrary proportion.
Show that 3, 5, 6, are in the subcontrary proportion.
Nicomachus defined a subcontrary proportion, which oc-   4
curs when in three terms the greatest is to the smallest as the difference of the smaller terms is to the difference of the greater. Show that 3, 5, 6, are in the subcontrary proportion. F
mjvictor13   167   1 Reply
2 months ago
When you calculate the sample size for a proportion, you use an estimate for the population ...
When you calculate the sample size for a proportion, you use an estimate for the population ...
When you calculate the sample size for a proportion, you use an estimate for the population proportion; namely   ^. A conservative value for n can be obtained by using  ^    = ______ .
           &nbs
Stevbo   283   1 Reply
2 months ago
Show that an "Euler path" over a series of bridges connecting certain regions...
Show that an "Euler path" over a series of bridges connecting certain regions...
14.   Show that an “Euler path” over a series of bridges connect- ing certain regions (a path that crosses each bridge exactly once) is always possible if there are either two or no regions that are approached by an odd number of bridges.
mjvictor13   178   1 Reply
Hard
2 months ago
Multiple myeloma or blood plasma cancer is characterized by increased blood vessel formulation in ...
Multiple myeloma or blood plasma cancer is characterized by increased blood vessel formulation in ...
Multiple myeloma or blood plasma cancer is characterized by increased blood vessel formulation in the bone marrow that is a prognostic factor in survival. One treatment approach used for multiple myeloma is stem cell transplantation with the patient’
Stevbo   168   1 Reply
2 months ago
In order to ride in a car at the Tomorrowland Speedway at Magic Kingdom, you must be at least 32 ...
In order to ride in a car at the Tomorrowland Speedway at Magic Kingdom, you must be at least 32 ...
In order to ride in a car at the Tomorrowland Speedway at Magic Kingdom, you must be at least 32 inches tall.  To drive a car at the Tomorrowland Speedway, you must be at least 54 inches tall.  Assume 5th graders heights are normally distri
garymiller28602   153   1 Reply
2 months ago
7.Critically evaluate the quality of research design and evidence in published social research.
7.Critically evaluate the quality of research design and evidence in published social research.
7.Critically evaluate the quality of research design and evidence in published social research.


whats this mean?
paulmiyahira   188   1 Reply
2 months ago
Critical interpretations of quantitative research literature in sociology and other social sciences.
Critical interpretations of quantitative research literature in sociology and other social sciences.
form critical interpretations of quantitative research literature in sociology and other social sciences.
paulmiyahira   89   N/A
Medium
2 months ago
This week's main Forum requires you to answer the question completely and correctly to receive full
This week's main Forum requires you to answer the question completely and correctly to receive full
perform a basic linear regression analysis using your dependent variable and sex/gender and race as the two independent variables (IV).  You will follow the instructions in the text in chapter 17 to first create a dummy variable for both of your
paulmiyahira   58   3 Replies
Medium
2 months ago
Describe and apply the concepts and logic of elementary statistics. Conduct statistical analysis in ...
Describe and apply the concepts and logic of elementary statistics. Conduct statistical analysis in ...
You chose data which were representative of your interests and satisfied your research question and hypotheses.  
This Assignment meets these course objectives:
Describe and apply the concepts and logic of elementary statistics.
C
paulmiyahira   123   N/A
2 months ago
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Home Q & A Board Science-Related Homework Help Mathematics (Moderator: JoannaMills)