BUAL 2650 Final Exam (Chen |\ |\ |\ |\ |\
Yan) WITH ANSWERS |\ |\
The mean life of a pair of shoes is 40 months with a standard
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
deviation of 8 months. If the life of the shoes is normally
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
distributed, how many pairs of shoes out of one million will need
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
replacement before 36 months? - CORRECT ANSWERS ✔✔308,537 |\ |\ |\ |\ |\ |\ |\
A standard normal distribution has a mean of_______ and standard
|\ |\ |\ |\ |\ |\ |\ |\ |\
deviation of _________. - CORRECT ANSWERS ✔✔Zero, One
|\ |\ |\ |\ |\ |\ |\ |\
The area under the normal curve between z=0 and z=1
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
is_________ the area under the normal curve between z=1 and |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
z=2. - CORRECT ANSWERS ✔✔greater than
|\ |\ |\ |\ |\
A new company is in the process of evaluating its customer service.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The company offers two types of sales: (1) internet sales and (2)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
store sales. The marketing research manager believes that the
|\ |\ |\ |\ |\ |\ |\ |\ |\
internet sales are more than 10 percent higher than store sales. The
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
null hypothesis would be? - CORRECT ANSWERS ✔✔P (internet)-
|\ |\ |\ |\ |\ |\ |\ |\ |\
P (store) <= .10
|\ |\ |\
, In order to test the effectiveness of a drug called XZR designed to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reduce cholesterol level, the cholesterol levels of 9 heart patients are
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
measured before they are given the drug. The same 9 patients use
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
XZR for two continuous months. After two months of continuous
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
use, the cholesterol levels are measured again. The comparison of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
cholesterol levels before versus after administering the drug is an|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
example of testing the difference between? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Matched pairs from two dependent populations |\ |\ |\ |\ |\
In testing the difference between the means of two normally
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
distributed populations using independent random samples with |\ |\ |\ |\ |\ |\ |\
equal variances, the correct test statistic to use is? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔T statistic |\ |\
A new company is in the process of evaluating its customer service.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The company offers two types of sales: (1) internet sales and (2)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
store sales. The marketing research manager believes that the
|\ |\ |\ |\ |\ |\ |\ |\ |\
internet sales are more than 10 percent higher than store sales. The
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
alternative hypothesis for this problem would be stated as? - |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔P (internet)- P (store) >.10 |\ |\ |\ |\ |\ |\
When testing a hypothesis about the mean of mean of a population
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
of paired differences in which two different observations are taken
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
on the same units, the correct test statistic to use is_________. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔T |\ |\
Yan) WITH ANSWERS |\ |\
The mean life of a pair of shoes is 40 months with a standard
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
deviation of 8 months. If the life of the shoes is normally
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
distributed, how many pairs of shoes out of one million will need
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
replacement before 36 months? - CORRECT ANSWERS ✔✔308,537 |\ |\ |\ |\ |\ |\ |\
A standard normal distribution has a mean of_______ and standard
|\ |\ |\ |\ |\ |\ |\ |\ |\
deviation of _________. - CORRECT ANSWERS ✔✔Zero, One
|\ |\ |\ |\ |\ |\ |\ |\
The area under the normal curve between z=0 and z=1
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
is_________ the area under the normal curve between z=1 and |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
z=2. - CORRECT ANSWERS ✔✔greater than
|\ |\ |\ |\ |\
A new company is in the process of evaluating its customer service.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The company offers two types of sales: (1) internet sales and (2)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
store sales. The marketing research manager believes that the
|\ |\ |\ |\ |\ |\ |\ |\ |\
internet sales are more than 10 percent higher than store sales. The
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
null hypothesis would be? - CORRECT ANSWERS ✔✔P (internet)-
|\ |\ |\ |\ |\ |\ |\ |\ |\
P (store) <= .10
|\ |\ |\
, In order to test the effectiveness of a drug called XZR designed to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reduce cholesterol level, the cholesterol levels of 9 heart patients are
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
measured before they are given the drug. The same 9 patients use
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
XZR for two continuous months. After two months of continuous
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
use, the cholesterol levels are measured again. The comparison of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
cholesterol levels before versus after administering the drug is an|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
example of testing the difference between? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Matched pairs from two dependent populations |\ |\ |\ |\ |\
In testing the difference between the means of two normally
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
distributed populations using independent random samples with |\ |\ |\ |\ |\ |\ |\
equal variances, the correct test statistic to use is? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔T statistic |\ |\
A new company is in the process of evaluating its customer service.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The company offers two types of sales: (1) internet sales and (2)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
store sales. The marketing research manager believes that the
|\ |\ |\ |\ |\ |\ |\ |\ |\
internet sales are more than 10 percent higher than store sales. The
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
alternative hypothesis for this problem would be stated as? - |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔P (internet)- P (store) >.10 |\ |\ |\ |\ |\ |\
When testing a hypothesis about the mean of mean of a population
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
of paired differences in which two different observations are taken
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
on the same units, the correct test statistic to use is_________. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔T |\ |\
