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The average undergraduate cost of tuition, fees and books for a two year college is $10,560....

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Statistics

The average undergraduate cost of tuition, fees and books for atwo year college is $10,560. Four years later, a random sample 36two year colleges, had an average cost of tuition, fees and booksof $11,380 and a standard deviation of $1300, with a normaldistribution. At α = 2%, has the average cost of two-year collegeincreased?

1) Check and state the conditions for statistical inference.

2) Compute a 95% confidence interval for the average cost oftuition fees and books for a two year college.

3) Write a statement interpreting the confidence interval.

4) Write the null and alternate hypotheses.

5) Calculate the standard error and sketch the model, markingthe center and ± SD’s

6) Calculate the p-value, showing ALL the work.

7) State the conclusion, remember there are three parts.Remember that α =2% or α =.02.

Answer & Explanation Solved by verified expert
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1 Conditions Sample should be from normal    See Answer
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