Q3: It is said that a fully charged cell phone battery can last about 9 hours on average with a standard deviation of about 6 hours. Assuming that the time a fully charged battery lasts has a normal distribution, how many hours or less must it be in the bottom 20%?

Q: 6. The time college students spend on the Internet follows a Normal distribution. At Johnson…

A: Mean () =5standard deviation () =1.2sample size(n)=100

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A: x313306309299297317315296304308

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A: The confidence level is 0.80.

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A:

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A: The formula of the confidence interval is,Where, denotes the sample mean denotes the critical value…

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A: a) The likelihood function for the parameter θ given the data y can be written as follows:The…

Q: You may need to use the appropriate appendix table or technology to answer this question. Consider…

A: Sample mean = 19.3Standard deviation = 2Sample size = 50

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A: grams (x)volume in mL(y)1643.818.549.22156.423.5652670.528.577.33185.8

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A: A study was conducted to to investigate the association between income level and political party…

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A: The formula of R -squared is,where,SSR denotes the sum of regression squaresSSE denotes the error…

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A: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

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A:

Q: Run a regression analysis on the following data set, where y is the final grade in ar average number…

A: Given Data set x = 4, 5, 8, 9, 11, 11, 14, 15, 15, 20Data set y = 43.6, 63, 65.2, 70.6, 65.4, 74.4,…

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A: Given:To prove:

Q: The accompanying table shows results of challenged referee calls in a major tennis tournament. Use a…

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A: The provided information is as follows:The total number of rows is .The total number of columns is .

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A: x1=33n1=85x2=26n2=80confidence level=99%sample proportion () =0.3882352941 sample proportion ()…

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A: n=sample size=1300 X=700

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Q: Below are pupil sizes from two samples: 8 men and 8 women (measured in millimeters).  Test the…

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Q: Refer to 9.3.4 below and Let X = 1.6 and construct the 95 percent confidence interval for μy|x and…

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A: Answer The level of significance = 0.05                       Gulity            Not gulity   Sent…

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A: n=10=8.7s=1.3=0.05

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A: The given data is as follows: Blood Platelet Count of Males…