In each of Exercises, we have provided a sample mean,

slanglyn3u2

slanglyn3u2

Answered question

2022-04-23

In each of Exercises, we have provided a sample mean, sample standard deviation, and sample size. In each case, use the one-mean t-test to perform the required hypothesis test at the 5% significance level.
x = 24, s = 4, n = 15, H0: μ = 22, Ha: μ > 22

Answer & Explanation

Cloplerotly1gu

Cloplerotly1gu

Beginner2022-04-24Added 11 answers

The test hypotheses are given below:
Null hypothesis:H0:μ=22,
Alternative hypothesis: Ha:μ>22.
Critical value approach:
Critical value:
For 5% level of significance,
α =1-0.95
α = 0.05
Hence, the cumulative area to the left is,
Area to theleft = 1- Area to theright
=1-0.05
= 0.95
From Table of the standard normal distribution, the critical value is 1.645.
Test statistic:
z=xμσn=2422415=1.94If test statistics is greater than the critical value, then reject the null hypothesis. Otherwise, do not reject the null hypothesis.
Conclusion:
Here, the test statistic is greater than the critical value.
For right-tailed test, the null hypothesis is rejected.
Thus, it can be said that there is sufficient evidence to reject the null hypothesis.

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