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The IRS claims that it takes 87 minutes to file tax form.You believe it takes longer than 87 minutes.You ask 19people and find the following...

Please help with this problem: The IRS claims that it takes 87 minutes to file tax form. You believe it takes longer than 87 minutes. You ask 19 people and find the following preparation times:

69, 70, 72, 73, 79, 80, 85, 88, 91, 97, 97, 99, 105, 105, 108, 113, 117, 119, 138

Determine if the preparation time is significantly longer than 87 minutes. Use α = .05.

What assumption is necessary to conduct this analysis?

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