MATH 1280 Exam/ Questions & Certified
Solutions.
The population in this survey is:
Select one:
a. The researchers that conducted the survey.
b. Customers that arrive at dealerships of the company.
c. The automobile producing company.
d. Owners of cars that are produced by the company. - Answer: b. Customers that
arrive at dealerships of the company.
The sample in this survey is:
Select one:
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, a. The team that conducted the survey.
b. Customers that arrive at dealerships of the company.
c. "Yes", "No", or "Refuse to Answer".
d. Customers that arrive at the selected dealerships during the day of visit. -
Answer: d. Customers that arrive at the selected dealerships during the day of
visit.
What is the relative frequency of direct hits that were category 2 hurricanes?
Select one:
a. 0.2637
b. 0.7363
c. 0.2601
d. Not enough information to calculate. - Answer: a. 0.2637
The total of all relative frequencies is 1.000. Denote by p the relative frequency of
category 2 hurricanes. Observe that
0.3993 + p + 0.2601 + 0.0659 + 0.0110 = 1.0000
Consequently,
p = 1 - 0.3993 + 0.2601 + 0.0659 + 0.0110 = 1 - 0.7363 = 0.2637
The correct answer is: 0.2637
The relative frequency of direct hits that were AT LEAST a category 3 storm is
Answer :?
Correct. (The numerical answer that you provide should be of the form "0.xxxx",
with four digits to the right of the zero.) - Answer: The relative frequency of
category 3 or more is the sum of the relative frequencies of categories 3, 4 , and 5:
0.2601 + 0.0659 + 0.0110 = 0.3370
The correct answer is: 0.337
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Solutions.
The population in this survey is:
Select one:
a. The researchers that conducted the survey.
b. Customers that arrive at dealerships of the company.
c. The automobile producing company.
d. Owners of cars that are produced by the company. - Answer: b. Customers that
arrive at dealerships of the company.
The sample in this survey is:
Select one:
Page 1 of 5
, a. The team that conducted the survey.
b. Customers that arrive at dealerships of the company.
c. "Yes", "No", or "Refuse to Answer".
d. Customers that arrive at the selected dealerships during the day of visit. -
Answer: d. Customers that arrive at the selected dealerships during the day of
visit.
What is the relative frequency of direct hits that were category 2 hurricanes?
Select one:
a. 0.2637
b. 0.7363
c. 0.2601
d. Not enough information to calculate. - Answer: a. 0.2637
The total of all relative frequencies is 1.000. Denote by p the relative frequency of
category 2 hurricanes. Observe that
0.3993 + p + 0.2601 + 0.0659 + 0.0110 = 1.0000
Consequently,
p = 1 - 0.3993 + 0.2601 + 0.0659 + 0.0110 = 1 - 0.7363 = 0.2637
The correct answer is: 0.2637
The relative frequency of direct hits that were AT LEAST a category 3 storm is
Answer :?
Correct. (The numerical answer that you provide should be of the form "0.xxxx",
with four digits to the right of the zero.) - Answer: The relative frequency of
category 3 or more is the sum of the relative frequencies of categories 3, 4 , and 5:
0.2601 + 0.0659 + 0.0110 = 0.3370
The correct answer is: 0.337
Page 2 of 5
