Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 100 minutes and a standard deviation of 10 minutes. Whatproportion of 1040R tax forms will be completed in at most 104 minutes? Round your answer to at least four decimal places.0XG

Answered: Suppose that the time required to…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Suppose you have already calculated the mean, the average deviation, and the standard deviation of the weights in pounds of 20 third-graders. a. if these weights were converted to kilograms and the mean and the average deviation were once again calculated, would the second average deviation be (numerically) less than, greater than, or equal to the first average deviation? Explain your answer. b. If the standard deviation of these weights were calculated in kilograms, would it be (numerically) less than, greater than, or equal to the first standard deviation? Explain your answer
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In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviationfor the test scores was 5.2 points. If an 11th person takes the test and scores 77 points, predict what willhappen to the mean and standard deviation. Circle the appropriate conclusion in the sentences below. The mean will increase // decrease // stay the same. The standard deviation will increase // decrease // stay the same.
= 19 inches. Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a friend tells you that the average length of trout caught in Pyramid Lake is u However, a survey reported that of a random sample of 51 fish caught, the mean length was x 18.6 inches, with estimated standard deviation s = 3.3 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is less than μ = 19 inches? Use a = 0.05. = (a) What is the level of significance? State the null and alternate hypotheses. O Ho: μ = 19 in; H₁: μ ‡ 19 in Ho: μ> 19 in; H₁: μ = 19 in O Ho: μ 19 in O Ho: μ = 19 in; H₁: μ 0.010 O 0.0010 < P-value < 0.010 O 0.250 < P-value < 0.0010 0.125 < P-value < 0.250 O P-value < 0.125 Sketch the sampling distribution and show the area corresponding to the P-value.
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Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 100 minutes and a standard deviation of 10 minutes. What proportion of 1040R tax forms will be completed in at most 104 minutes? Round your answer to at least four decimal places. X G