45 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 45 watches have an average error of 119 sec and the sample standard deviation of the watch errors is 165 sec. Use a 0.02 significance level to test the claim that the average watch reads the correct time (use a two-sided alternative). The test statistic is  The P-Value is

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A: Formula : CI=(x̄1 - x̄2) ± ME

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A: Obtain the 90% confidence interval estimate for the true mean amount of caffeine in eight-ounce cups…

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Q: Six different rain gauges on campus recorded the following precipitations during the month of…

A: Here, x x-x (x-x)2 8.4 -1.63 2.6569 9.8 -0.23 0.0529 11.1 1.07 1.1449 4.6 -5.43 29.4849…

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Q: Suppose you made 5 measures of your walking times and got the following values: 5.6 s,  5.9 s, 5.5…

A: 5.6 , 5.9,  5.5,  5.6,  5.8 Sample size(n)=5

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A: Mean = 4.2Standard deviation = 0.6Sample size = 100

Q: A student randomly selects 10 paperbacks at a store. The sample standard deviation is $1.50.…

A: Solution To find confidence interval we will use chi square distribution.

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A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer  first…

Q: The average time it takes a certain brand of ibuprofen to start working is 25 minutes, with a…

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