Four typists take 15,10,6 and 5 minutes respectively to type a letter. Determine the average time required to type a letter if : (a) Four letters are to be typed by each typist. (b) Each typist works for two hours.

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A: (a) Obtain the value of correlation The value of correlation is obtained below as follows:

Q: ence interval for a population mean, compute the margin of error, E. 11.00<μ<13.1411.00<μ<13.14

A: Given the confidence interval 11.00&lt;μ&lt;13.14 Computing the Margin of error is given as below:

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Q: Find the (a) mean, (b) median, (c) mode, and (d) midrange for the data and then (e) answer the given…

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A: x x2 162 26244 164 26896 213 45369 166 27556 89 7921 202 40804…

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Q: Example 5: Find a 90% confidence interval for the mean difference in the mileage obtained for tires…

A: Given: 50 45 50 50 100 100 100 -10 75 -25 0 25 75 25 50 40 35

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Q: If n=31, ¯xx¯(x-bar)=38, and s=16, construct a confidence interval at a 98% confidence level. Assume…

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Q: State TWO (2) reasons why you would undertake sampling rather than a census for the proposed study

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Q: QUESTION 18 "An repeated measures ANOVA is used to evaluate the differences among 4 treatment…

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Q: The standard error is an estimator of the standard deviation of the estimator  True  False

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Q: QUESTION 27 A repeated measures ANOVA produced the partially completed ANOVA summary table below.…

A: Given that  In ANOVA dfbetween = 3 , dfwithin = 20 , dfbetween subject = 5 , dferror = 4 SSbetween =…

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Q: Let X₁, X2, X3,..., X30 be a random sample of size 30 from a population distributed with the…

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