Mkt 352 final exam study guide LEE
asu Question and answers already
passed 2025/2026
One of the major problems with mail surveys is nonresponse bias. In an effort to minimize this, a
researcher decides to limit the sample to his personal friends from whom he is sure to get replies. This is
an example of a: - correct answer ✔A. probability sample.
B. non-probability sample.
C. simple random sample.
D. stratified sample.
E. none of the above.
b. non-probability sample
Suppose I want to estimate the average age of the undergrad students at ASU. From previous studies I
know that the population standard deviation is 6 years. I want to produce an estimate that will be with
in +/- 1.5 years with a 95% level of confidence. In simple random sampling, how many students do I
need to survey? - correct answer ✔A. 32
B. 45
C. 62
D. 122
E. 150
𝑛 = 𝑧^2*𝜎^2/𝐷^2 =1.96^2*6^2/1.5^2
=61.47
, c. 62
Failure to include some units, or entire sections, of the defined survey population in the actual
operational sampling frame represents: - correct answer ✔A. non-coverage error
B. non-response error
C. sampling error
D. random error
E. observation error
a. non-coverage data
Suppose that a random sample of 550 new car owners found that 38 percent of them were aware of a
particular brand of tires that your company sells. What is the 99% confidence interval for the proportion
of those who are aware of a particular brand of tires that your company sells? - correct answer
✔A .0.339≤𝜋≤0.421
B. 0.346≤𝜋≤0.414
C. 0.346≤𝜋≤0.454
D. 0.327≤𝜋≤0.433
E. 0.301≤𝜋≤0.483
𝑆𝑎𝑚𝑝𝑙𝑖𝑛𝑔 𝐸𝑟𝑟𝑜𝑟 (𝑆𝐸) = (sqrt)(𝑝(1− 𝑝))/𝑛
= 2.58(sqrt)(0.38(1−0.38))/550
= 0.0534
𝐶𝑜𝑛𝑓𝑖𝑑𝑒𝑛𝑐𝑒 𝐼𝑛𝑡𝑒𝑟𝑣𝑎𝑙 = (𝑝−𝑆𝐸, 𝑝+𝑆𝐸 )
= (0.38− 0.0534, 0.38+ 0.0534)
= (0.3266,0.4334)
asu Question and answers already
passed 2025/2026
One of the major problems with mail surveys is nonresponse bias. In an effort to minimize this, a
researcher decides to limit the sample to his personal friends from whom he is sure to get replies. This is
an example of a: - correct answer ✔A. probability sample.
B. non-probability sample.
C. simple random sample.
D. stratified sample.
E. none of the above.
b. non-probability sample
Suppose I want to estimate the average age of the undergrad students at ASU. From previous studies I
know that the population standard deviation is 6 years. I want to produce an estimate that will be with
in +/- 1.5 years with a 95% level of confidence. In simple random sampling, how many students do I
need to survey? - correct answer ✔A. 32
B. 45
C. 62
D. 122
E. 150
𝑛 = 𝑧^2*𝜎^2/𝐷^2 =1.96^2*6^2/1.5^2
=61.47
, c. 62
Failure to include some units, or entire sections, of the defined survey population in the actual
operational sampling frame represents: - correct answer ✔A. non-coverage error
B. non-response error
C. sampling error
D. random error
E. observation error
a. non-coverage data
Suppose that a random sample of 550 new car owners found that 38 percent of them were aware of a
particular brand of tires that your company sells. What is the 99% confidence interval for the proportion
of those who are aware of a particular brand of tires that your company sells? - correct answer
✔A .0.339≤𝜋≤0.421
B. 0.346≤𝜋≤0.414
C. 0.346≤𝜋≤0.454
D. 0.327≤𝜋≤0.433
E. 0.301≤𝜋≤0.483
𝑆𝑎𝑚𝑝𝑙𝑖𝑛𝑔 𝐸𝑟𝑟𝑜𝑟 (𝑆𝐸) = (sqrt)(𝑝(1− 𝑝))/𝑛
= 2.58(sqrt)(0.38(1−0.38))/550
= 0.0534
𝐶𝑜𝑛𝑓𝑖𝑑𝑒𝑛𝑐𝑒 𝐼𝑛𝑡𝑒𝑟𝑣𝑎𝑙 = (𝑝−𝑆𝐸, 𝑝+𝑆𝐸 )
= (0.38− 0.0534, 0.38+ 0.0534)
= (0.3266,0.4334)
