If anyone can help me with this question, I\'d reallyappreciate it! Will rate :)

Question

If anyone can help me with this question, I'd reallyappreciate it! Will rate :)

Heights of grade school reporters. Are childrenwho repeat a grade in elementary school shoter on average, thantheir peers? To answer this question, researchers compared theheights of Australian school children who repeated a grade to thosewho did not. All height measurements were standardized usingz-scores. A summary of the results, by gender, is shownbelow: Never Repeated Repeated a Grade Boys n = 1349
x-bar = .30 s = .97 n = 86
x-bar = -.04
s = 1.17 Girls n = 1366
x-bar = .22
s = 1.04 n = 43
x-bar = .26
s = .94 (a). Set up the null and alternative hypothesis fordetermining whether the average height of Australian boys whorepeated a grade is less than the average height of boys who neverrepeated. (b). Conduct the test, part (a), using = .05. (c). Repeat parts (a) and (b) for Australian girls. If anyone can help me with this question, I'd reallyappreciate it! Will rate :)

Heights of grade school reporters. Are childrenwho repeat a grade in elementary school shoter on average, thantheir peers? To answer this question, researchers compared theheights of Australian school children who repeated a grade to thosewho did not. All height measurements were standardized usingz-scores. A summary of the results, by gender, is shownbelow: Never Repeated Repeated a Grade Boys n = 1349
x-bar = .30 s = .97 n = 86
x-bar = -.04
s = 1.17 Girls n = 1366
x-bar = .22
s = 1.04 n = 43
x-bar = .26
s = .94 (a). Set up the null and alternative hypothesis fordetermining whether the average height of Australian boys whorepeated a grade is less than the average height of boys who neverrepeated. (b). Conduct the test, part (a), using = .05. (c). Repeat parts (a) and (b) for Australian girls. Never Repeated Repeated a Grade Boys n = 1349
x-bar = .30 s = .97 n = 86
x-bar = -.04
s = 1.17 Girls n = 1366
x-bar = .22
s = 1.04 n = 43
x-bar = .26
s = .94

Explanation / Answer

Let 1 be the repeated a grade      2 be never repeated (a) The test hypothesis is Ho: 1=2 Ha: 1

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