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Individual truck drivers are either male or female. In the US 5% of all truck drivers are women, 95% are men. Suppose 20 US truck drivers are randomly selected to be interviewed about their pay.
a.What's the probability that fewer than 2 of the randomly selected truck drivers are women?b.What is the expected number of women in a random selection of 20 truck drivers?
Is spine bone density is normally distributed in young women with a mean of 1.0 g/cm 2 and a standard deviation of .10 g/cm 2 , then how many young women out of 100 would you expect to have bone densities less than .85 g/cm 2 ?
r. Patton is a professor of English. Recently she counted the number of misspelled words in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 word..
The mean number of chocolate chips per cookie is 6.1. What is the probability that she will find less than 5 chips in a particular cookie?
The Confused Bricklayer Robot Problem - Draw a picture to illustrate the initial problem situation and how can you describe a possible solution?
Construct a 98 percent confidence interval estimate of the difference between the two sample means (Please show work).
One suggested environmental determinant of pediatric lung function is the level of cigarette smoking in the home. A researcher wants to do a pilot study with two groups:
State the decision rule using the .01 significance level. Compute the value of chi-square. What is your decision regarding H0?
Which of the following is true about a 95% confidence interval of the mean of a given sample:
Sketch the distribution of Stanford -Binet IQ test scores. Write the equation that gives the z score corresponding to a Stanford-Binet IQ test score. Sketch the distribution of such z scores.
Use a 5% significance level to test the claim that there appears to be a difference in the effectiveness of the two diets.
At α = .01, did yellow fire trucks have a considerably lower accident rate? Determine sample proportions and z test statistic.
What is the probability that (a) the birthdays of twelve people will fall in twelve di?erent calendar months (assume equal probabilities for the twelve months).
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