believes that the game will be liked by players In
Last updated: 5/19/2023
believes that the game will be liked by players In particular the studio claims that the mean player rating will be higher than 75 In a random sample of 37 players the mean rating is 82 7 Assume the population standard deviation of the ratings is known to be 18 6 Is there enough evidence to support the claim that the mean player rating is higher than 75 Perform a hypothesis test using the 0 10 level of significance a State the null hypothesis H and the alternative hypothesis H Ho H 0 given by Z b Perform a hypothesis test The test statistic has a normal distribution so the test is a z test Here is some other information to help you with your test x 0 n Standard Normal Distribution Step 1 Select one tailed or two tailed O One tailed O Two tailed Step 2 Enter the critical value s Round to 3 decimal places 20 10 is the value that cuts off an area of 0 10 in the right tail The test statistic has a normal distribution and the value is Step 3 Enter the test statistic Round to 3 decimal places 9 3 0 2 0 1 Since the value of the test statistic lies in the rejection region the null hypothesis is rejected So there is enough evidence to support the claim that the mean player rating is higher than 75 H O Since the value of the test statistic lies in the rejection region the null hypothesis is not rejected So there is not enough evidence to support the claim that the mean player rating is higher than 75 Since the value of the test statistic doesn t lie in the rejection region the null hypothesis is rejected So there is enough evidence to support the claim that the mean player rating is higher than 75 0 0 00 0 020 O Since the value of the test statistic doesn t lie in the rejection region the null hypothesis is not rejected So there is not enough evidence to support the claim that the mean player rating is higher than 75 X X c Based on your answer to part b choose what can be concluded at the 0 10 level of significance about the claim made by the studio 0 0 DO X X S 5