A Neilson Company report states that the mean number of TV sets in the U.S. household is 2.24. Assume the standard deviation of the population is 1.2. A sample of 100 households is taken Let x¯ be the sample mean number of TV sets in households. a) x¯ ~ Normal (= ["", "", "", ""] , = ["", "", "", ""] ) b) The probability that the sample mean number of TV sets in the 100 households is greater than 2 is ["", "", "", ""] c) The 30th percentile of the sample
A Neilson Company report states that the
Let x¯ be the sample mean number of TV sets in households.
a) x¯ ~ Normal (= ["", "", "", ""] , = ["", "", "", ""] )
b) The probability that the sample mean number of TV sets in the 100 households is greater than 2 is ["", "", "", ""]
c) The 30th percentile of the sample mean of TV sets is ["", "", "", ""]
The National Health and Nutrition Examination Survey reported in the recent year, the mean cholesterol level for U.S. adults was 202 with standard deviation of 41 (unit: mg/dl)
A simple random sample of 110 adults are chosen.
Let x¯ be the sample mean cholesterol with
a) The probability that the sample mean cholesterol level of the sample of 110 is greater than 210 is P(x¯>210) = ["", "", "", ""]
b) What is the probability that the sample mean is between 190 and 200: P(190<x¯<200) = ["", "", "", ""]
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