A) The perimeter of a rectangle is the sum of the lengths of its four sides. Write an expression for the perimeter of the rectan
gle and then evaluate when x=1/2 foot? B) The area of a rectangle is the product of its length and width. Write an expression for the area of the rectangle and then evaluate when x=1/2 feet?
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Using the t-distribution, it is found that there is not enough evidence that the diet is helping people lose weight.
<h3>What are the hypothesis tested?</h3>At the null hypothesis, it is tested if the mean hasn't decreased, that is:
.
.
Hence, for the distribution of differences, they are:
.
The test statistic is:
In which is the value tested at the null hypothesis.
Hence:
t = 0.85.
Considering a right-tailed test with 9 + 9 - 2 = 16 df, with a standard significance level of 0.05, the critical value is t = 1.7459. Since t = 0.85 < 0.85, there is not enough evidence that the diet is helping people lose weight.
More can be learned about the t-distribution at brainly.com/question/13873630
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