A. If you would like to investigate on certain issue the opinions of College Sta
ID: 3054273 • Letter: A
Question
A. If you would like to investigate on certain issue the opinions of College Station residents from different age groups, suppose you are going to have 100 subjects for your sample, which study design is best?
(a) Randomly sample 100 TAMU students
(b) Randomly sample 100 TAMU professors
(c) Randomly ask 100 HEB shoppers the question.
(d) Ask 100 friends and their family members the question.
(e) Ask 100 Stat 302 students the question.
B. To estimate the market share for iPad, travel content and planning service GeckoGo did a survey of members and their willingness to jump on the iPad bandwagon in February, 2010. The company asked 750 travelers using its Facebook application whether they would be interested in buying the latest in Apple’s long line of devices and just one in five of those who had heard of it (71%) saying they were very interested in the product. What type of bias does this study have?
(a) No bias.
(b) Under-coverage bias.
(c) Self-selection bias.
(d) Non-response bias.
(e) Bias caused by too small a sample size.
C. Suppose that Body mass index (BMI) of adult male from the USA follows a normal distribution with standard deviation of 2.80. A random sample of 20 adult men was selected and the sample mean was found to be 28.55. Calculate a 95% confidence interval for the mean BMI of all US adult men.
(a) (28.28, 28.82)
(b) (25.11, 31.99)
(c) (23.10, 34.00)
(d) (27.32, 29.78)
(e) Cannot calculate a confidence interval because the sample size is under 30.
Explanation / Answer
Dear student, only the first question is being answered as per Chegg guidelines. Please post only one question in one go.
(A)
The best would be to sample students, as the inference is to be drawn for students not particuclar to a course as such.
So the correct answer is (a) Random sample 100 TAMU students
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