STA 3032 Lecture 10: 5.2

4. A statistics practitioner would like to draw a histogram of 62 observations that range from 5.2 to 6.1. What is an appropriate number of classes for intervals?

4. A statistics practitioner would like to draw a histogram of 62 observations that range from 5.2 to 6.1. Define the upper limits of the classes you would use.

Suppose a random sample of size 10 was taken from a normally distributed population, and the sample standard deviation was calculated to be s = 5.2.

a)  Calculate the margin of error for a 95% confidence interval for the population mean.

Give your response to at least 3 decimal places.

b)  Calculate the margin of error for a 90% confidence interval for the population mean.

Give your response to at least 3 decimal places.