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There are 20 pieces of fruit in a bowl and 5 of them are apples. What percent of the fruit are apples?


The average monthly cell phone bill was reported to be $50.07 by the U.S. Wireless Industry. Random Sampling of a large cell pho

yellowcomic.com:

The null and alternative hypotheses are:

*

*
50.07" alt="H_{a}:\mu>50.07" align="absmiddle" class="latex-formula">

Under the null hypothesis, the test statistic is:

*

Where:

*
is the sample mean

*
is the sample standard deviation

*
is the sample size

*

*

Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:

*

Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.


4 0
8 months ago

Is 2/4 greater than 1/8
lord <1>
2/4 is greater than 1/8 because if you change 2/4 to a fraction with the same denominator it would be 4/8 and 1/8. So 2/4 is greater than 1/8
4 0
8 months ago
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