Question

- It is known that the average tuition per semester at colleges
in Virginia is $3712. Suppose we take a sample of 15 colleges and
find that the average tuition per semester is $4512 with a sample
standard deviation of $595. We are interested in testing if the
average amount of tuition is increasing. Show work and formulas
used.
- Using the sample of 15 people, what would the 95% confidence interval be for the population mean?
- What are the null and alternative hypotheses?
- What is the critical value at 95% confidence?
- Calculate the test statistic.
- Find the p-value
- What conclusion would be made here at the 95% confidence level?
- Would my conclusion change if I changed alpha to .01? Show reasoning.

Answer #1

It is known that the average tuition per semester at colleges
in Virginia is $3712. Suppose we take a sample of 15 colleges and
find that the average tuition per semester is $4512 with a sample
standard deviation of $595. We are interested in testing if the
average amount of tuition is increasing.
Using the sample of 15 people, what would the 95% confidence
interval be for the population mean?
What are the null and alternative hypotheses?
What is the...

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Suppose we take a sample of 30 adults and find that the average
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actually lower than 80 beats per minute. ( please show all steps
and how you got each number)
a. Using the sample of 30 adults, what would the 95%...

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The average tuition and room and board cost at a small private
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Assume the distribution is normal. Let X be the cost for a randomly
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possible.
a. What is the distribution of X? X ~ N(,)
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Assume the distribution is normal. Let X be the cost for a randomly
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possible.
a. What is the distribution of X? X ~ N(___,___)
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possible.
a. What is the distribution of X? X ~ N( ____ , ____ )
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possible.
a. What is the distribution of X? X ~ N(Correct,Correct)
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Incorrect
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In 2015, the average cost of attendance at public 2-year
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Based on past data, it is known that about 8.96% of people who
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Show all steps with formulas used.
If I wanted to control my margin of error and set it to 3%...

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