Business Stat CBAD 291 correctly
answered to pass
A research firm surveyed 49 randomly selected Americans to determine the mean amount spent on
coffee during 1 week. The sample mean was $20 per week. The population distribution is normal with a
standard deviation of $5. - correct answer ✔✔20
18.60 21.40
Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of
gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a
population standard deviation of 2.30 gallons. From his records, he selects a random sample of 60 sales
and finds the mean number of gallons sold is 8.60. - correct answer ✔✔8.60
7.835 and 9.365
Dr. Patton is a professor of English. Recently she counted the number of misspelled words in a group of
student essays. She noted the distribution of misspelled words per essay followed the normal
distribution with a population standard deviation of 2.44 words per essay. For her 10 a.m. section of 40
students, the mean number of misspelled words was 6.05. - correct answer ✔✔5.294
6.806
Use t Distribution Table to locate the value of t under the following conditions. (Round your answers to 3
decimal places.)
a. The sample size is 15 and the level of confidence is 95%.
b. The sample size is 24 and the level of confidence is 98%.
c. The sample size is 12 and the level of confidence is 90%. - correct answer ✔✔2.145
2.500
1.796
, The owner of Britten's Egg Farm wants to estimate the mean number of eggs produced per chicken. A
sample of 20 chickens shows they produced an average of 20 eggs per month with a standard deviation
of 2 eggs per month. (Use t Distribution Table.) - correct answer ✔✔Unknown
20
2.093
0.94
19.06 to 20.94
No
No
The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 16 people
reveals the mean yearly consumption to be 45 gallons with a standard deviation of 20 gallons. Assume
the population distribution is normal. (Use t Distribution Table.) - correct answer ✔✔Unknown
45
1.753
na
36.235 to 53.765
yes
Ms. Maria Wilson is considering running for mayor of the town of Bear Gulch, Montana. Before
completing the petitions, she decides to conduct a survey of voters in Bear Gulch. A sample of 400 voters
reveals that 300 would support her in the November election. (Round your answers to 3 decimal places.)
- correct answer ✔✔0.750
0.694 to 0.806
Netflix is considering a new romcom (romantic comedy) series. Before making a final decision, the
producers design an experiment to estimate the proportion of viewers who would watch the series. A
random sample of 400 viewers was selected and asked to watch the first two episodes. After viewing the
episodes, 250 viewers indicated they would watch the new series. (Round your answers to 3 decimal
places.) - correct answer ✔✔0.625
0.563 and 0.687
answered to pass
A research firm surveyed 49 randomly selected Americans to determine the mean amount spent on
coffee during 1 week. The sample mean was $20 per week. The population distribution is normal with a
standard deviation of $5. - correct answer ✔✔20
18.60 21.40
Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of
gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a
population standard deviation of 2.30 gallons. From his records, he selects a random sample of 60 sales
and finds the mean number of gallons sold is 8.60. - correct answer ✔✔8.60
7.835 and 9.365
Dr. Patton is a professor of English. Recently she counted the number of misspelled words in a group of
student essays. She noted the distribution of misspelled words per essay followed the normal
distribution with a population standard deviation of 2.44 words per essay. For her 10 a.m. section of 40
students, the mean number of misspelled words was 6.05. - correct answer ✔✔5.294
6.806
Use t Distribution Table to locate the value of t under the following conditions. (Round your answers to 3
decimal places.)
a. The sample size is 15 and the level of confidence is 95%.
b. The sample size is 24 and the level of confidence is 98%.
c. The sample size is 12 and the level of confidence is 90%. - correct answer ✔✔2.145
2.500
1.796
, The owner of Britten's Egg Farm wants to estimate the mean number of eggs produced per chicken. A
sample of 20 chickens shows they produced an average of 20 eggs per month with a standard deviation
of 2 eggs per month. (Use t Distribution Table.) - correct answer ✔✔Unknown
20
2.093
0.94
19.06 to 20.94
No
No
The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 16 people
reveals the mean yearly consumption to be 45 gallons with a standard deviation of 20 gallons. Assume
the population distribution is normal. (Use t Distribution Table.) - correct answer ✔✔Unknown
45
1.753
na
36.235 to 53.765
yes
Ms. Maria Wilson is considering running for mayor of the town of Bear Gulch, Montana. Before
completing the petitions, she decides to conduct a survey of voters in Bear Gulch. A sample of 400 voters
reveals that 300 would support her in the November election. (Round your answers to 3 decimal places.)
- correct answer ✔✔0.750
0.694 to 0.806
Netflix is considering a new romcom (romantic comedy) series. Before making a final decision, the
producers design an experiment to estimate the proportion of viewers who would watch the series. A
random sample of 400 viewers was selected and asked to watch the first two episodes. After viewing the
episodes, 250 viewers indicated they would watch the new series. (Round your answers to 3 decimal
places.) - correct answer ✔✔0.625
0.563 and 0.687
