1. In a random sample of 17 people, the mean commute time to work was 32.7 minutes and the standard deviation

was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 95% confidence interval for the population mean μ. What is the margin of error of μ? Interpret the results

a) The confidence interval for the population mean b) the margin

2. 2. The confidence interval for the population mean b) the margin
In a recent year, the scores for the reading portion of a test were normally distributed, with a mean of
21.5 and a standard deviation of 5.8
Complete parts (a) through (d) below.
a)The probability of a student scoring less than 16 is
b)The probability of a student scoring between 18.2 and 24.8 is
c)The probability of a student scoring more than 33.2 is

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