Question: I was told to upload this question again to get help and figure out how to find the standardized test statistic z. Please help me

I was told to upload this question again to get help and figure out how to find the standardized test statistic z. Please help me and show your work so I can take notes. I believe it's part (a) through (e). Please advise me and help me!

A random sample of 76 eighth grade students' scores on a national mathematics assessment test has a mean score of 269. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 31. At a = 0.06, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and Ha. Choose the correct answer below. O A. Ho: H z 260 (claim) O B. Ho: u= 260 (claim) C. Ho: us 260 Ha: H 260 Ha: [ > 260 (claim) O D. Ho: H 260 (claim) Ha: [ > 260 (b) Find the standardized test statistic z. z = (Round to two decimal places as needed.)

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