If the population mean speed on this stretch of the highway

Reference no: EM13633735

It has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. It has been thought that changing the speed limit from 65mph to 70mph would not increase the "typical" speed of 70 - 75mph. On one stretch of a highway the speed limit was increase from 65mph to 70mph. If the population mean speed on this stretch of the highway has been 68mph with a standard deviation of 5mph, what is the sample size needed to detect an increase in speed on this stretch of the highway of 10mph? Let alpha = 0.02 and beta = 0.05

Write the null and alternative hypotheses:

Draw the curves and label alpha and beta:

Calculate the sample size:

Reference no: EM13633735

Questions Cloud

The financial analysts at duro headquarters believe the : rochelle contacted a company that produced electric motors and vector drives and its consultants told her that it would

It is believed that the population standard deviation for : discover card would like to test the hypothesis that the average credit score for an adult in dallas is different from

A national manufacturer of unattached garages discovered : a national manufacturer of unattached garages discovered that the distribution of the lengths of time it takes two

What is the percentage of the total area under the normal : 1. the mean of a normal distribution is 408 pounds. the standard deviation is 13 pounds. what is the area between 424

If the population mean speed on this stretch of the highway : it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that

Assume you plan to construct a 95 confidence interval the : assume you plan to construct a 95 confidence interval. the numbers of online applications from simple random samples of

The effectiveness of treating respiratory infections with : the effectiveness of treating respiratory infections with herbal remedies was studied. days of fever was used to

Ue a significance level of 001 to test the claim that p1 : use a significance level of 0.01 to test the claim that p1 p2. use the given sample sizes and numbers of success to

In estimating the mean monthly fuel expenditure miu per : in estimating the mean monthly fuel expenditure miu per household vehicle the u.s. energy information administration

User Account

All Pages