alexuuuhg177 alexuuuhg177

19-03-2020
Mathematics

contestada

The speeds of vehicles traveling on a highway are normally distributed with an unknown population mean and standard deviation. If a random sample of 38 vehicles is taken to estimate the mean vehicle speed, what t-score should be used to find a 99% confidence interval estimate for the population mean

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akindeleot akindeleot

19-03-2020

Answer:

The t-score of 2.715 should be used

Step-by-step explanation:

Degrees of freedom ==> n - 1 ==> 38 - 1 ==> 37

to find 99% confidence interval, Hence,

Find t0.005 in front of 37 degrees of freedom,

Therefore the answer is, t-score = 2.715

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