The coefficient of determination is the of the linear correlation coefficient.
A) square B) square root C) opposite D) reciprocal
Q. 2A drug company wanted to test a new indigestionmedication. The researchers found 700 adults aged 25-35 and randomly assigned them to two groups. The first group received the new drug, while the second received a placebo.
After one month of treatment, the percentage of each group whose indigestion symptoms decreased was recorded and compared. What is the response variable in this experiment? A) the percentage who had decreased indigestion symptoms
B) the type of drug (medication or placebo)
C) the 700 adults aged 25-35
D) the one month treatment time
Q. 3A brewery has a beer dispensing machine that dispenses beer into the company's 12 ounce bottles. The distribution for the amount of beer dispensed by the machine follows a normal distribution with a standard deviation of 0.19 ounce.
The company can control the mean amount of beer dispensed by the machine. What value of the mean should the company use if it wants to guarantee that 98.5 of the bottles contain at least 12 ounces (the amount on the label)? Round to the nearest thousandth. A) 12.412 oz B) 12.462 oz C) 12.003 oz D) 12.001 oz
Q. 4A quiz consists of 570 true or false questions. If the student guesses on each question, what is the mean number of correct answers?
A) 285 B) 0 C) 570 D) 114
Q. 5An experiment in which neither the experimental unit nor the researcher in contact with the experimental unit knows which treatment the experimental unit is receiving is called a ________________ .
A) double-blind experiment B) single-blind experiment
C) randomized block design D) matched-pairs design
Q. 6The amount of soda a dispensing machine pours into a 12 ounce can of soda follows a normal distribution with a standard deviation of 0.12 ounce.
Every can that has more than 12.30 ounces of soda poured into it causes a
spill and the can needs to go through a special cleaning process before it can be sold. What is the mean amount
of soda the machine should dispense if the company wants to limit the percentage that need to be cleaned
because of spillage to 3?
A) 12.0744 oz B) 12.5256 oz C) 12.0396 oz D) 12.5604 oz
Q. 7A recent article in the paper claims that government ethics are at an all-time low. Reporting on a recent sample, the paper claims that 41 of all constituents believe their representative possesses low ethical standards.
Suppose 20 of a representative's constituents are randomly and independently sampled. Assuming the paper's claim is correct, find the probability that more than eight but fewer than 12 of the 20 constituents sampled believe their representative possesses low ethical standards. A) 0.372646 B) 0.245893 C) 0.593087 D) 0.596302
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