(a) Use a computer program to calculate the proba-bility that more than 12 of 80 business telephone calls last longer than five minutes if it is assumed that 10 percent ofsuch calls last that long. (b) Can this result be used as evidence that the assump-tion is reasonable? Why?

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A: From the given information, The claim of the problem is the default rate this year is greater than…

Q: For many years, businesses have struggled with the rising cost of health care. But recently, the…

A: sample size (n) = 900p^ = 0.5895% ci p.

Q: b) You decide to buy 10,000 shares of each company. If the covariance between ABC and XYZ is 0, what…

A: Assuming equal investment in both stocks, here's how to calculate the expected return and standard…

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A: Given that  Sample size n =300 Sample proportion for bullish p^=38.2%=0.382 Sample proportion for…

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A: We perform ANOVA using the step by step procedure in excel as below: Enter the data into excel…

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Q: Why is their hypothesis test right-tailed?

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Q: *************** Data released by the Department of Education regarding the rate (percentage) of…

A: Given thatData released by the Department of Education regarding the rate (percentage)of ninth-grade…

Q: 2. An independent research group is intere through Cesarian Section is decreasing. Fc through…

A:

Q: The U.S. Bureau of Labor Statistics reports that 11.6% of U.S. workers belonged to unions in 2020. A…

A: From the given information we find the solution.

Q: For many years, businesses have struggled with the rising cost of health care. But recently, the…

A: sample size(n)=900 sample proportion(p^)=52%=0.52 confidence level=95%

Q: showed that 64 were on time. An SRS of 100 flights by Happy Airlines showed that 80 were on time.…

A:

Q: In a sample of 42 men, 26 said that they had less leisure time today than they had 10 years ago. In…

A:

Q: Online Tax Returns. According to the Internal Revenue Service, among people entitled to tax refunds,…

A: It is given that:

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A:

Q: (a) The minimum UGPA that would still place a student in the top 5% of UGPAS is. (Round to two…

A: u = 3.28 sigma =0.19

Q: (b)  Some electronic devices are better used than new: The failure rate is higher when they are new…

A: Define the following events:   A: the music player has the flaw B : the music player does not have…

Q: What is the​ p-value?

A: Here sample size is too large so use z test for proportion

Q: Suppose that the City of Chicago is interested in potential revenues if they introduce a tolling…

A: suppose that the average time between cars is only 1.6 seconds X~Poisson(1.6)

Q: survey of a random sample of 1019 U.S. adults with invest- ments of $10,000 or more. Based on the…

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Q: Benford’s Law is an observation about the leading digits of the numbers found in real-world data…

A:

Q: The manager of a big corporation finds out that on average, 40% of sick days are logged on Mondays…

A: Monday and Friday constitute of 25=0.4% of the workweek.

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: The test statistic for this sample is, Thus, the test statistic is 1.022.

Q: inflation rate, raised their estimate of the gross national product (GNP) growth rate. ad lowered…

A:

Q: A. Ho: p= 0.401 B. Ho: p = 0.401 C. Ho p= 0.401 O D. Ho: p= 0.401 O E. Ho: p= 0.401 F. Ho: p= 0.401…

A: The correct statistical hypotheses for this investigation are formulated based on the editor's…

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A: due to Bartleby policy I can do only 3 sub part of the given question we have given The stock…

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A: Correct option is d) 14750

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A: 90% of the time the door should open if the card is inserted because the door is not locked from…

Q: William Profit is studying companies going public for the first time. He is particularly interested…

A: The given data is  shown below x y 9 10.8 94.4 11.3 27.3 11.2 179.2 11.1 71.9 11.1…

Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.