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new menu will have any effect on the variance The owner surveys a random sample of 19 customers who ordered from the new menu For the customers surveyed the variance of ratings is 13 9 Assume the ratings for customers who order from the new menu follow a normal distribution Is there enough evidence to conclude that the population variance differs from 25 6 To answer complete the parts below to perform a hypothesis test Use the 0 10 level of significance a State the null hypothesis and the alternative hypothesis that you would use for the test Ho H 0 Chi square Distribution O Step 1 Enter the number of degrees of freedom Step 3 Enter the test statistic Round to 3 decimal places O 0 0 0 O O Step 2 Select one tailed or two tailed O One tailed OTwo tailed Step 5 Enter the p value Round to 3 decimal places 0 20 0 0 b Perform a chi square test and find the p value Here is some information to help you with your chi square test The value of the test statistic is given by 1 s The p value is two times the area under the curve to the left of the value of the test statistic S Step 4 Shade the area represented by the p value X 0 03 02 1 10 Since the p value is less than or equal to the level of significance the null hypothesis is rejected So there is enough evidence to conclude that the variance differs from 25 6 c Based on your answer to part b choose what can be concluded at the 0 10 level of significance about the population variance of ratings for customers who order from the new menu Since the p value is less than or equal to the level of significance the null hypothesis is not rejected So there is not enough evidence to conclude that the variance differs from 25 6 Since the p value is greater than the level of significance the null hypothesis is rejected So there is enough evidence to conclude that the variance differs from 25 6 Since the p value is greater than the level of significance the null hypothesis is not rejected So there is not enough evidence to conclude that the variance differs from 25 6 30 X X 3 O BEEN Aa M

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