Question Help Assume that the sample is a simple random sample obtained from a n

Question

Question Help Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statstics professors Use the table below to tind the minimum sample sze needed to be 99% confident that the sample standard deviat on s is within 50% of ? Is this sample sze practican To be 95% content that sis within T1% 5% 10% 20% 30% 40%T50% of the value of o, the sample size 19.205 768 192 48 21 28 should be at least Tobe 99% cort dent thatsis within 1% 5% 10% 20% 30% 40% 50% ? DI the value of ?, the sample sze n 3218|1336|336| 85 | 38 | 22 | 14 should be at least The minimum sample size needed is y Is this sample size practical? O A. No, because the sample size is excessively large to be practical for most applications r O B. Yes, because the sample size is small enough to be practical for most applications O C. No, because the sample size should be as small as possible for most applications O D. Yes, because the sample size should be as large as possible for most applicaions

Explanation / Answer

s is within 50% and 99% confident,

Sample size = 14

Option B is correct.

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