A student investigating study habits asks a simple random sample of 16 student a
ID: 2971787 • Letter: A
Question
A student investigating study habits asks a simple random sample of 16 student at her school how many minutes they spent on their English homework the previous night. Suppose the actual parameter values for this variable are mu = 45 minutes and sigma = 15 minutes. Which of the following best describes what we know about the sampling distribution of means for the student's sample? mu x = 45; sigma x unknown; shape of distribution unknown mu x = 45; sigma x = 15; distribution approximately Normal mu x = 45; sigma x = 15; shape of distribution unknown mu x = 45; sigma x = 3.75; distribution approximately Normal mu x = 45; sigma x = 3.75; shape of distribution unknown Olive weights are classified according to a unique set of adjectives implying great For example, the mean weight of olives classified as "Colossal" is 7.7 gm Suppose a particular company's crop of "Colossal" olives is approximately Normally distributed with a mean of 7.7 gm and a standard deviation of 0.2 gm. Which of the following represents the probability that the mean weight of a random sample of 3 olives from this population is greater than 8 gm? In a large population, 46% of the households own DVD recorders. A simple random sample of 100 households from this population is to be contacted and the sample proportion computed. Which of the following expressions represents the probability that more than half the households sampled will own a DVD recorder?Explanation / Answer
8.(c) 9.(a) 10.(e)
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