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For the data in given Exercise, the trimmed mean is X t = 42.17 with a Winsorized standard deviation of sw = 1.73. Test the hypothesis that the population trimmed mean is 45 with α = 0.05.
ExerciseA company claims that on average, when exposed to its toothpaste, 45% of all bacteria related to gingivitis is killed. You run 10 tests and find that the percentages of bacteria killed among these tests are 38, 44, 62, 72, 43, 40, 43, 42, 39, 41. The mean and standard deviation of these values are X¯ = 46.4 and s = 11.27. Assuming normality, test the hypothesis that the average percentage is 45 with α = 0.05.
ExxonMobil's required return for equity, re is 14%. Its required return for debt, rd is 8%, its debt-to-total-value ratio L, is 35%, and its marginal tax rate, T is 40%, calculate its (adjusted WACC)?
Delphi Leasing Company leases a new machine that has a cost and fair value of $225,000 to Lindy Corporation on a 5-year noncancelable contract.
Determine whether there is a statistically significant difference in systolic blood pressure between smokers and non-smokers and summarise graphically the total blood cholesterol data for males and for females.
At a certain restaurant, 55% of all people order an appetizer, 78% order a beverage, and 42% order bothan appetizer and a beverage. Let A represent the event that a person orders an appetizer, and B represent theevent that a person orders a bevera..
How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation?
Determine the probability distribution's missing value. The probability that a tutor will see 0, 1, 2, 3, 4, 5, 6, 7 or 8 students on a given day. The owner of a professional basketball team claims that the mean attendance at games is over 30,000 and..
Data are recorded on effects of each drug. Is research division by using dependent or independent samples? Explain why?
The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes. What is the standard error of the mean?
q1. when do americans decide what to make for dinner? an outline survey indicated that 74 of americans decided either
Briefly explain how sample size affect outcome of hypothesis test. How does sample size affect measures of effect size?
On page 336 of the text we are given a formula to calculate the minimum necessary sample size n. When we do not know the estimates p hat and q hat, we are told to use a value of 0.5 for each of them. Why?
Create a practice data file that contains the following variables and values: Compute the mean and standard deviation and variance and print out on a single page
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