AP STATISTICS UNIT 7 PROGRESS
CHECK: MCQ PART B CORRECT 100%
A marketing executive is investigating whether this year's advertising campaign has
resulted in greater mean sales compared with last year's mean sales. The executive
collects a random sample of 100 customer orders from a large population of orders and
calculates the sample mean and sample standard deviation.
Which of the following is the appropriate test for the executive's investigation? -
ANSWERB,
A one-sample t-test for a population mean
A travel company is investigating whether the average cost of a hotel stay in a certain
city has increased over the past year. The company recorded the cost of a one-night
stay for a Friday night in January of the current year and in the previous year for 31
hotels selected at random. The difference in cost (current year minus previous year)
was calculated for each hotel.
Which of the following is the appropriate test for the company's investigation? -
ANSWERD,
A matched-pairs t-test for a mean difference
A report on a certain fast food restaurant states that μ, the mean order total, is $9. The
manager of the restaurant believes the mean is higher. A random sample of orders will
be selected. The sample mean x¯ will be calculated and used in a hypothesis test to
investigate the belief.
Which of the following is the correct set of hypotheses? - ANSWERD,
H0: μ=9$
Ha:μ>9$
The mean number of sick days per employee taken last year by all employees of a large
city was 10.6 days. A city administrator is investigating whether the mean number of
sick days this year is different from the mean number of sick days last year. The
administrator takes a random sample of 40 employees and finds the mean of the
sample to be 12.9. A hypothesis test will be conducted as part of the investigation.
Which of the following is the correct set of hypotheses? - ANSWERB,
H0: μ=10.6
Ha:μ≠10.6
A local convenience store in a large city closes each day at 10 P.M. The owner of the
store is investigating whether mean sales will increase by at least $10 per day if the
store remains open until 11 P.M. The owner asked the 41 members of a local civic
group to estimate the amount of money they might spend during the extra hour. The
CHECK: MCQ PART B CORRECT 100%
A marketing executive is investigating whether this year's advertising campaign has
resulted in greater mean sales compared with last year's mean sales. The executive
collects a random sample of 100 customer orders from a large population of orders and
calculates the sample mean and sample standard deviation.
Which of the following is the appropriate test for the executive's investigation? -
ANSWERB,
A one-sample t-test for a population mean
A travel company is investigating whether the average cost of a hotel stay in a certain
city has increased over the past year. The company recorded the cost of a one-night
stay for a Friday night in January of the current year and in the previous year for 31
hotels selected at random. The difference in cost (current year minus previous year)
was calculated for each hotel.
Which of the following is the appropriate test for the company's investigation? -
ANSWERD,
A matched-pairs t-test for a mean difference
A report on a certain fast food restaurant states that μ, the mean order total, is $9. The
manager of the restaurant believes the mean is higher. A random sample of orders will
be selected. The sample mean x¯ will be calculated and used in a hypothesis test to
investigate the belief.
Which of the following is the correct set of hypotheses? - ANSWERD,
H0: μ=9$
Ha:μ>9$
The mean number of sick days per employee taken last year by all employees of a large
city was 10.6 days. A city administrator is investigating whether the mean number of
sick days this year is different from the mean number of sick days last year. The
administrator takes a random sample of 40 employees and finds the mean of the
sample to be 12.9. A hypothesis test will be conducted as part of the investigation.
Which of the following is the correct set of hypotheses? - ANSWERB,
H0: μ=10.6
Ha:μ≠10.6
A local convenience store in a large city closes each day at 10 P.M. The owner of the
store is investigating whether mean sales will increase by at least $10 per day if the
store remains open until 11 P.M. The owner asked the 41 members of a local civic
group to estimate the amount of money they might spend during the extra hour. The
