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Assume that? women's heights are normally distributed with a mean given by μ=62.6 in?, and a standard deviation given by sigma σ=2.2 in.
?(a) If 1 woman is randomly? selected, find the probability that her height is less than 63 inches.
?(b) If 38 women are randomly? selected, find the probability that they have a mean height less than 63 inches.
?(?a) The probability is approximately _____________
?(Round to four decimal places as? needed.)
?(b) The probability is approximately ______________.
Gas consumption of 3 cars (labeled car A, car B, and car C) using 4 different kinds of gasoline. Is there difference among kinds of gasoline?
Conduct an analysis of variance to determine whether the mean dominance ratings differ among the six facial expressions. Use α = .10.
A farmer has 40m of fencing with which to enclose a rectangular pen.Given that the pen is x m wide - show that it's area is (20x - x^2)m^2 and deduce that the maximum area that he can enclose (Answer given 100m^2).
you are evaluating two portfolios for your personal investment on the basis of their return.portfolio as yearly return
at parkview at any given time the probability that a randomly selected student is a female is 30. with this binomial
Constructing a Pareto chart. You manage the customer service operation for a maker of electronic equipment sold to business customers.
Do these results suggest that the different therapies have different effects on mental health? (Use the .05 level.) a. Use the five steps of hypothesis testing.
The slopes of the lines parallel to X axis and Y axis are. The slope of the line parallel to the line y = 10x and passing through origin
a) Set up the null and alternative hypotheses, and perform the hypothesis test. b) Based on these results, does the diet appear to be effective? Does the diet appear to have practical significance?
Compute descriptive statistics (5-number summary, mean, mode, range and standard deviation) for each of the years along with an explanation of what the descriptive statistics tell us about the different years. Are they continually growing, or is t..
Can one conclude at a level of significance of .01 that the new ball has improved his game?
In a simple linear regression, the least squares regression line is (a) the line which makes the sample correlation as close to +1 or -1 as possible. (b) the line which best splits the data in half, with half of the data points lying above the reg..
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