Stats problem, please help. I already finished it but I wanted to see if i got t

Question

Stats problem, please help. I already finished it but I wanted to see if i got them correct (took the pictures before I filled it in though)

ck the appropriate test write the hypothesis in symbolic notation and as a sentence in context. pes of test: 1-proportion z-test 2-proportion z-test 1-sample mean t-test 2-sample mean t-test According to Instagram's self-reported statistics, the average Instagram user has 843 followers on Instagram. For a statistics project a student at Santa Ana College tests the hypothesis that SAC students will average more than 843 followers on Instagram. Name of test: Ho: HA: It was reported in 2016 that 44.29% of graduates rated their overall experience at SAC as "Excellent. You decide to conduct a survey if that number has changed in 2018. Name of test: Ho: HA: On average students spend less than 30 minutes on stats homework each week Claim: Name of test: Ho: 10) HA:

Explanation / Answer

10)

1- sample mean t-test

Ho: mu = 30
Ha: mu < 30

9)
1- proportion z-test
Ho: p = 0.4429
Ha: p not equal to 0.4429
8)
Ho: mu = 843
Ha: mu > 843

7)
a) df = n-1 = 20
critical value = +1.725 , -1.725

(mean -1.725*2.4/sqrt(21)), (mean +1.725*2.4/sqrt(21)))

mean is not shown

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