× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
Bokie1213 Bokie1213
wrote...
Posts: 342
Rep: 1 0
6 years ago

  If the alternative hypothesis of a test is Ha: , what is the corresponding null hypothesis?
 

  a.Ha:
  b.Ha:
  c.Ha:
 

d.Ha:
 
 



Q. 2

If a test of H0: versus Ha: were conducted for a sample of size 20, what would be the critical region for a significance level of ?
   
  a.t > 2.09
  b.t < -2.09 or t > 2.09
  c.t < -1.73 or t > 1.73
 

d.(-4.5,4.5)
 
 



Q. 3


  Suppose the p-value equals 0.018 for testing whether or not bags of candy had on average more than 25 pieces of candy in them. Which of the following conclusions would be correct for testing the hypotheses H0: versus Ha: ?
 

  a.It can be concluded that there are more than 25 pieces of candy on average in a bag at the level.
  b.It can be concluded that there are more than 25 pieces of candy on average in a bag at the level.
  c.It can be concluded that there are more than 25 pieces of candy on average in a bag at the level, and at the level.
 

d.It can be concluded that there are not more than 25 pieces of candy on average in a bag at the level.
 
 



Q. 4


  Suppose a random sample of 15 individual's ages had the following statistics: , s = 4.1. What is the test statistic for testing H0: versus Ha: ?
 

  a.t = -1.89, df = 15
  b.t = 30.23, df = 29
  c.z = -1.89
  d.t = 1.89, df = 14

Q. 5

A random sample of 25 packets of flower seeds had a mean of 32 seeds. How many degrees of freedom would the t statistic for this study have?
   
  a.25
  b.31
  c.24
  d.It depends on the sample variance.

Q. 6


  Which of the following t distribution most closely resembles the standard normal distribution?
 

  a.A t distribution with df = 0.
  b.A t distribution with df = 50.
  c.A t distribution with df = 200.
  d.A t distribution with df = 1.

Q. 7


  When should a t statistic be used?
 

  a.When the mean is known but the standard deviation is unknown and must be estimated by s.
  b.When both the mean is unknown and must be estimated by and the standard deviation is unknown and must be estimated by s.
  c.When both the mean is known and the standard deviation is known.
 

d.When the standard deviation is known but the mean is unknown and must be estimated by .
 
 



Q. 8


  Suppose a random sample of 10 televisions has a mean life of 25 years. If it is known that , what is the test statistic for testing H0: and Ha: ?
 

  a.There is not enough information given to determine the test statistic.
  b.-2.66
  c.0.60
  d.0.004
Read 78 times
3 Replies
Replies
Answer verified by a subject expert
AdzoviAdzovi
wrote...
Posts: 310
Rep: 2 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

Bokie1213 Author
wrote...
6 years ago
You are really a genius. Thanks
wrote...
6 years ago
NP
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1105 People Browsing
Related Images
  
 288
  
 265
  
 55
Your Opinion
What's your favorite funny biology word?
Votes: 156

Previous poll results: What's your favorite coffee beverage?