5) 5. After their medical appointments with her, Dr. Jackson asked 42 of her pat

Question

5) 5. After their medical appointments with her, Dr. Jackson asked 42 of her patients if they were satisfied with their medical appointment. She had those patients rate their overall satisfaction by answering the following question, "How satisfied are you with the medical appointment you just had?" 1-not at all satisfied; 7- completely satisfied. She found that the average response was a satisfaction score of 5.2. Since Dr. Jackson is mostly concerned with the patients in the sample, the purpose of Dr. Jackson's survey is best described as A) sampling error B) descriptive C) inferential 6) 6. A U.S. Senator from Indiana wanted to know what all her constituents thought about the Clean Air Act that was coming up for a vote in the Senate. She sent a letter to a sample of 257 Indiana voters asking them if they supported the Clean Air Act even if it meant they would have to pay higher prices for gasoline. The results indicated that 39% efthe sample supported the Clean Air Act even if it meant higher gasoline prices. The purpose of this survey is best described as A) sampline error B) descriptive C) inferential

Explanation / Answer

Question 5

Answer:

C) Inferential

Explanation: For the given scenario, Dr. Jackson infer about the patients overall satisfaction based on the random sample of 42 patients. Sample observations are used for the inference of overall satisfaction of all patients after medical appointment with Dr. Jackson.

Question 6

Answer:

C) Inferential

Explanation: For the given scenario, the percentage of the Indiana voters who support the Clean Air Act is calculated based on sample observations of 257 Indiana voters. Based on the result from these observations, the percentage of the supported voters is calculated and it is used for inference regarding the percentage of all Clean Air Act supported voters.

Question 11

Answer:

A) a statistic

Explanation: We know that a statistic is related to the sample observation and parameter is related to the population observations. Here, two values 49 and 44 are the means of two groups based on 20 sample observations per group. These are sample means and hence these are called as a statistic.

Question 18

Answer:

A) True

Explanation: In a random sampling, each element or sample observation has same chance of being selected. Each random sample of same size from the finite population has same chance of obtaining. So each possible sample is equally likely to be one obtained.

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