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On hot, sunny, summer days, Jane rents inner tubes by the river that runs through her town. Based on her past experience, she has assigned the following probability distribution to the number of tubes she will rent on a randomly selected day.
x255075100TotalP(x).10.38.31.211.00
(a) Find the probability expressions: (Round your answers to 2 decimal places.)
a.P(X = 50)
b.P(X ≤ 75)
c.P(X > 50)
d.P(X < 100)
Using the 5% significance level, test the null hypothesis that the distributions of good and defective parts are the same for both subsidiaries.
The relative frequency distribution of the number of TVs sold in a day in a department store in the last year is as follows: Compute the mean and standard deviation of this distribution.
The time to complete a construction project is normally distributed with a mean of 60 weeks and a standard deviation of 4 weeks. What is the probability the project will take longer than 65 weeks?
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
At the 5% significance level, test whether the type of heating influences a household's delinquency in payment. Interpret your results.
Plant B has a standard deviation of 150 model FX32's per day. Which of the plants would you prefer to manage? Explain why you would prefer that particular plant.
If your beach trip is all weekend, and you probably will have the music on for 16 hours, which battery is most likely to last? Explain.
Calculate the safety stock for PVBs for each quarter. (σQ1 = 1877, σQ2 = 3361, σQ3 = 3851, σQ1 = 1877 and σQ4 = 8154). Assume the formula SS = z σtL1/2. Create a APP that minimises costs.
a non profit company concerned with the school dropout rates in a nearby state has designed a tutoring program aimed at
Each year Ms. Fontanez has the chance to invest in two different no-load mutual funds: the Go-Go Fund or the Go-Slow Mutual Fund. At the end of each year, Ms. Fontanez liquidates her holdings, takes her profits, and then reinvests.
Charles, Julia, and Alex are in grades 4, 3, and 2, respectively, and are representing their school at a spelling bee.
The company obtains a random sample of 165 claims and finds x‾ = $16,530 and s = $5,542. Give a 95% confidence interval and a 99% confidence interval for the average amount of a claim.
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