A bank claims that the mean waiting time in line is less than 1.7 minutes. A...

A bank claims that the mean waiting time in line is less than 1.7 minutes. A random sample of 20 customers has a mean of 1.5 minutes with a standard deviation of 0.8 minute. Test the bank’s claim at 0.01 level of significance.

Solutions

Expert Solution

Let denotes the mean waiting time.

There is not sufficient evidence to suppirt the claim that the mean waiting time in line is less than 1.7 minutes.

orchestra answered 1 year ago

Next > < Previous

Related Solutions

A local retailer claims that the mean waiting time is less than 8 minutes. A random...

A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.8 minutes with a standard deviation of 2.1 minutes. At a = 0.01, test the retailer's claim. Assume the distribution is normally distributed. Round the test statistic to the nearest thousandth.

A local retailer claims that the mean waiting time is less than 8 minutes. A random...

A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.3 minutes with a standard deviation of 2.1 minutes. At α = 0.01, test the retailerʹs claim. Assume the distribution is normally distributed. Use any method, however, follow the PHANTOMS acronym. P - Parameter Statement H - Hypotheses A - Assumptions & Conditions N - Name the Test and state the curve you're using T...

Wells Fargo claims that the waiting time for its customers is the lower than at Bank...

Wells Fargo claims that the waiting time for its customers is the lower than at Bank of the West. You draw random samples of 30 customers at each bank. At Wells Fargo, the mean waiting time is found to be 5.3 minutes, with a standard deviation of 1.1 minutes. At Bank of the West, the mean waiting time is found to be 5.6 minutes with a standard deviation of 1.2 minutes. Test Wells Fargo’s claim at a 0.05 significance level....

On Time Airlines claims their average delay is less than 15 minutes per flight. A random...

On Time Airlines claims their average delay is less than 15 minutes per flight. A random sample of 35 flights has a sample mean of 14 minutes and standard deviation of 7 minutes. You will need to test the claim that the average delay is less than 15 minutes per flight using a 2.5% level of significance. a) State the hypotheses b) Find the rejection region. c) Will you reject or retain the null hypothesis? Show all work to support...

A local bank claims that the waiting time for its customers to be served is the...

A local bank claims that the waiting time for its customers to be served is the lowest in the area. A competitor bank checks the waiting times at both banks. The sample statistics are listed below. Test the local bank's claim. Use the information given below. Use the significant level of .05 and assume the variances are equal. sample size Local Bank n1 = 46 Competitor Bank n2 = 50 Average waiting time in minutes for each sample Xbar1 =...

The table below shows the time in minutes that customers spent waiting in a bank....

The table below shows the time in minutes that customers spent waiting in a bank. Time (min.) Frequency 5 7 6-10 8 11-15 9 16-20 4 21-25 6 Calculate the mean, mode and median [4+4 + 4] (b) Calculate the variance. [5] (c) Calculate the standard deviation. [2] (d) Calculate the coefficient of skewness [3] (e) Calculate the coefficient of variation.

A.) The amount of time customers spend waiting in line at a bank is normally distributed,...

A.) The amount of time customers spend waiting in line at a bank is normally distributed, with a mean of 3.5 minutes and a standard deviation of 0.75 minute. Find the probability that the time a customer spends waiting is as follows. (Round your answers to three decimal places.) less than 4 minutes less than 2 minutes B.) The breaking point of a particular type of rope is normally distributed, with a mean of 310 pounds and a standard deviation...

(CO7) A restaurant claims the customers receive their food in less than 16 minutes. A random...

(CO7) A restaurant claims the customers receive their food in less than 16 minutes. A random sample of 39 customers finds a mean wait time for food to be 15.8 minutes with a population standard deviation of 4.1 minutes. At α = 0.04, what type of test is this and can you support the organizations’ claim using the test statistic? Claim is the alternative, reject the null so support the claim as test statistic (-0.30) is in the rejection region...

A bus company official claims that the mean waiting time for a bus during peak hours...

A bus company official claims that the mean waiting time for a bus during peak hours is less than 10 minutes. Karen took a bus during peak hours on 18 different occasions. Her mean waiting time was 9.1 minutes with a standard deviation of 2.1 minutes. At the 0.05 significance level, test the claim that the mean waiting time is less than 10 minutes by providing each of the following: a. the null and alternative hypothesis b. the test statistic...

The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour...

The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour is less than 10 minutes. A random sample of 20 waiting times has a mean of 8.6 minutes with a sample standard deviation of 2.1 minutes. At ? = 0.01, test the bus company's claim. Assume the distribution is normally distributed. - critical value z0 = -2.326; standardized test statistic ? -2.981; reject H0; There is sufficient evidence to support the Metropolitan Bus Company's...

Subjects