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Question: Consider the following random sample of 15 employee numbers from this database: 66, 37, 56, 11, 32, 23, 53, 43, 55, 25, 7, 26, 36, 22, and 20.
a. Find the percentage of women for this sample.
b. Find the standard error for the percentage of women and interpret it.
c. Why should you be hesitant to use this sample and the methods of this chapter to compute a confidence interval for the percentage of women?
a survey found that womens heights are normally distributed with a mean 62.2 in and standard deviations 2.5 in the
The number of washings before water no longer "beads" on the surface is found to be as listed here. At the 0.05 level, can we conclude that the wax formulations are equally effective?
A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years.
a study of the attendance at the university of alabamas basketball games revealed that the distribution of attendance
Presume a second independent poll of 1000 voters (800 from community 1 and 200 from 2). What is prob. A is predicted the winner by one poll and B is predicted the winner by the other?
Estimate the company s expected profit on such policies if mortality tables indicate that only 2.6% of women age 65 die within a year.
For M = 2 samples, find h = [h0 h1]', the coefficients of the optimum linear prediction filter of Xn+1, given Xn-1 and Xn. What is the mean square error of the optimum linear predictor?
It is believed that the mean height of high school students who play basketball on the school team is 73 inches with a standard deviation of 1.8 inches.
Make a histogram showing the distribution of the number of broken pieces in the 24 batches of pottery examined.- What aspect of the company's problem is more apparent in the scatterplot?
Translate the following statements into symbolic form using capital letters to represent affirmative English statements.- Chevron continues to pollute provided that British Petroleum does, but Koch Industries and Exxon Mobil deny climate change.
An electronic circuit board fails randomly with failure rate of λ=0.00021 /h. When it fails it is replaced by a new board.
For the significance level used in part (a), construct the appropriate confidence interval and verify the conclusion reached in part (a).
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