A random sample of local commute times in minutes produces the data set below. Assume the data come from a normally distributed population. 34 45 29 61 45 57 15 35 29 35 42 40 37 39 21 62 37 47 What is the point estimate for mean commute time? Check the confidence interval requirements Construct the 99% confidence interval for commute times Previous

A random sample of local commute times in minutes produces the data set below. Assume the data come from a normally distributed population. 34 45 29 61 45 57 15 35 29 35 42 40 37 39 21 62 37 47 What is the point estimate for mean commute time? Check the confidence interval requirements Construct the 99% confidence interval for commute times Previous

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 11PPS

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Question

A random sample of local commute times in minutes produces the data set below. Assume the data come from a normally distributed population.

34 45 29 61 45 57 15 35 29 35 42 40 37 39 21 62 37 47

What is the point estimate for mean commute time?
Check the confidence interval requirements
Construct the 99% confidence interval for commute times

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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