Cameron is playing 9 holes of golf. He needs to score a total of at most 9 over par on the last four holes to beat his best golf score. On the last four holes, he scores 5 over par, 3 under par, 4 over par, and 3 under
par
Part 1 out of 3
Enter and find the value of an expression that gives Cameron's score for 4 holes of golf.

Can someone please help, I don’t understand at all

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A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95