How many computers? In a simple random sample of 155 households, the sample mean number of personal computers was 2.83. Assume the population standard deviation is o=0.74. Part 1 of 4 (a) Construct a...


How many computers? In a simple random sample of 155 households, the sample mean number of personal computers was<br>2.83. Assume the population standard deviation is o=0.74.<br>Part 1 of 4<br>(a) Construct a 98% confidence interval for the mean number of personal computers. Round the answer to at least two<br>decimal places.<br>A 98% confidence interval for the mean number of personal computers is<br>2.69 <u < 2.97<br>Part: 1/ 4<br>Part 2 of 4<br>(b) If the sample size were 120 rather than 155, would the margin of error be larger or smaller than the result in part (a)?<br>Explain.<br>

Extracted text: How many computers? In a simple random sample of 155 households, the sample mean number of personal computers was 2.83. Assume the population standard deviation is o=0.74. Part 1 of 4 (a) Construct a 98% confidence interval for the mean number of personal computers. Round the answer to at least two decimal places. A 98% confidence interval for the mean number of personal computers is 2.69

Jun 11, 2022
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