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A school states that average tuition of their training program for various certifications taught there is...

A school states that average tuition of their training program for various certifications taught there is $950. You believe that the average tuition at the school is different from $950. You took a survey of 25 students who are registered for various courses. The average for this group is $900 with a standard deviation of $85. Test the hypothesis that the statement made by the school is incorrect. Use α = .05. What is your conclusion.

Math   Statistics-And-Probability   
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Answer #1

H0: = 950

Ha: 950

Test statistics

t = - / S / sqrt(n)

= 900 - 950 / 85 / sqrt(25)

= 2.94

t critical value at 0.05 level with 24 df = -2.064 , 2.064

Since test statistics falls in rejection H0, Reject H0

We conclude at 0.05 level that we have enough evidence to support the claim.

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