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A sample of 145 values is randomly selected from a population with mean equal to 43 and standard deviation equal to 19. (Give your answers correct to one decimal place.) (a) Determine the interval (smallest value to largest value) within which you would expect 99.7% of such sample means to lie. to (b) What is the amount of deviation from the mean for a sample mean of 45.9? (c) What is the maximum deviation you have allowed for in your answer to part (a)?
The quality control manager at a lightbulb factory needs to determine whether the mean life of a large shipment of lightbulbs is equal to the specified value of 375 hours.
Heights of men on a baseball team has a bell-shape distribution with a means of 173 cm and a standard deviation of 9 cm. Using the empirical, rule what is the approximate percentage of the men between the following values?
What is the standard general score conversion formula? Is this the same as a z-score formula? Which leads me to ask How do you convert from one standard score to another?
Suppose you are given the following estimated regression equation: Debt Ratio = 4000 + .20 Cash Flow. If the t-stat for the slope estimate is 3.25, what can you conclude?
Two impendent samples of signs 9 and 8 gave the sum of squares of deviation from their respective means as 160 and 91 can the samples be regarded as drawn from the normal population with equal variance
A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report.
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.
question 1 a box contains 8 red balls and 10 yellow balls. how many different ways can two balls be randomly selected
Assume the standard deviation is $160 and that the amount spent is normally distributed. What is the probability that the amount spent on a randomly selected child is more than $700?
Simplify each expression-Perimeter of a rectangle. The perimeter of a rectangular backyard is 6x+6 yards. If the width is x yards, find a binomial that represents the length.
A food processor is concerned that the 16 oz. can of sliced pineapple is being overfilled. The quality control department took a random sample of 50 cans and found that the arithmatic mean weight was 16.05 oz.
Pretests, posttests and threats to internal validity and please discuss all threats to internal validity.
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