Answer:
13778.94
Step-by-step explanation:
did it on my calculator
The volume is 810 ft^3= 9*10 *x
810=90x
x=810/90
x=9 feet is the long
Answer:
A variable is a quantity that may change within the context of a mathematical problem or experiment.
Step-by-step explanation:
Answer:
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Step-by-step explanation:
Using the t-distribution, as we have the standard deviation for the sample, we have that the test statistic is given by:
<h3>What are the hypothesis tested?</h3>
At the null hypothesis, it is tested if there is no difference, that is:
At the alternative hypothesis, it is tested if there is a difference, that is:
<h3>What is the test statistic?</h3>
The test statistic is given by:
The parameters are:
is the sample mean.
is the value tested at the null hypothesis.
- s is the standard deviation of the sample.
In this problem, 
is tested at the null hypothesis, and the sample is: 20, -40, -40, 0, 20, - 60, -40, hence:
.
Hence, the test statistic is:
More can be learned about the t-distribution at brainly.com/question/16313918
