A researcher is trying to determine if the average score on a standardized test has decreased. In previous years, it was 105. They collect the scores of 74 test takers from this year and find that the average and standard deviation of these scores is x = 94 and s = 8. To answer their question, the researcher decides to test Hoμ = 105 against Ha: μ< 105 What would be the value of the t-test statistic in this test? Round your answer to three decimal places.

Q: can you explain the first few questions aswell

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A: Step 1: Analyze the problem. Step 2: Check if there's lacking. Step 3: Give a suggestion

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