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 deviation of waiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.05. Complete parts (a) through (d) below. E Click on the icon to view the data. waiting times is less than 1.9 minutes, which is the standard a. Identify the null and alternative hypotheses. Choose the correct answer below. Customer waiting times O A. Ho: o= 1.9 minutes HA:a<1.9 minutes O B. Ho: a<1.9 minutes Customer Waiting Times (in minutes) 9.2 HA a=1.9 minutes OC. Ho: a=1.9 minutes O D. Ho: o21.9 minutes 6.9 6.8 72 7.9 H.:at19 minutes H.art g 67

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