The data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard deviation of waiting times is less than 1.8 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.025. Assume that the sample is a simple random sample selected from a normally distributed population. Complete parts (a) through (d) below. Click on the icon to view the data. a. Identify the null and alternative hypotheses. Choose the correct answer below. OA. Ho: 021.8 minutes HA: <1.8 minutes OC. Ho: o 1.8 minutes HA: 1.8 minutes b. Compute the test statistic. OB. Ho: <1.8 minutes HA σ 1.8 minutes D. Ho: o 1.8 minutes HA: <1.8 minutes Customer Waiting Times (Round to two decimal places as needed.) Customer Waiting Times (in minutes) 6.9 6.4 8.5 7.9 6.6 7.3 6.7 7.6 7.1 7.1 6.2 7.8 7.4 6.7 8.5 6.9 6.7 7.5 9.2 7.1 6.5 8.7 7.5 8.2 7.6 7.6 6.2 8.3 7.5 6.5 7.1 6.6 6.3 6.3 7.7 6.9 6.8 7.1 7.1 6.9 8.6 7.1 7.8 8.1 6.7 7.3 7.5 7.5 7.5 6.2 8.1 6.5 D Get more help 7.8 7.3 6.2 6.2 ar all Check answer 7.3 6.6 6.8 7.5

The data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard deviation of waiting times is less than 1.8 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.025. Assume that the sample is a simple random sample selected from a normally distributed population. Complete parts (a) through (d) below. Click on the icon to view the data. a. Identify the null and alternative hypotheses. Choose the correct answer below. OA. Ho: 021.8 minutes HA: <1.8 minutes OC. Ho: o 1.8 minutes HA: 1.8 minutes b. Compute the test statistic. OB. Ho: <1.8 minutes HA σ 1.8 minutes D. Ho: o 1.8 minutes HA: <1.8 minutes Customer Waiting Times (Round to two decimal places as needed.) Customer Waiting Times (in minutes) 6.9 6.4 8.5 7.9 6.6 7.3 6.7 7.6 7.1 7.1 6.2 7.8 7.4 6.7 8.5 6.9 6.7 7.5 9.2 7.1 6.5 8.7 7.5 8.2 7.6 7.6 6.2 8.3 7.5 6.5 7.1 6.6 6.3 6.3 7.7 6.9 6.8 7.1 7.1 6.9 8.6 7.1 7.8 8.1 6.7 7.3 7.5 7.5 7.5 6.2 8.1 6.5 D Get more help 7.8 7.3 6.2 6.2 ar all Check answer 7.3 6.6 6.8 7.5

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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