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1. The lengths of the sardines received by a certain cannery are normally distributed with mean 4.62 inches and a standard deviation 0.23 inch. What percentage of all these sardines is between 4.35 and 4.85 inches long?
2. Suppose that the weight (X) in pounds, of a 40-year-old man is a normal random variable with standard deviation σ = 20 pounds. If 5% of this population is heavier than 214 pounds what is the mean μ of this distribution?
3. Find the probability of :
a. z-score is greater than -1.58
b. z-score is less than 2.19
c. z-score between -0.89 and 1.06
a lot of 100 semiconductor chips contains 20 that are defective. three are selected at random without replacement from
Construct the sampling distribution of sample means for samples of size 2 selected from this set and construct the sampling distributions of sample ranges for samples of size 2
Let X be a normally distributed random variable with mean 600 and variance 10,000. Find two values x1 and x2 such that P(X > x1) = 0.01 and P(X > x2) = 0.05.
Discuss some of the strategies a sport organization can adopt to minimize liability for negligent hiring, negligent retention, or negligent supervision.
Blood. Only 4% of people have Type AB blood. a) On average, how many donors must be checked to find someone with Type AB blood?
the air temperature was 33of in the night and 66of in the day. so in the day it was twice as warm as in the night.
What percentage of the men who applied did Program A admit? What percentage of the women who applied did Program A admit? Repeat the question for Program B.
About 8% of the population has a particular genetic mutation. 900 people are randomly selected.
What technique can be used to adjust these differences.
Auditor wants to be within 7% of true proportion when using 95% confidence level. How many files should auditor sample?
Heights of men on a baseball team have a bell-shaped distribution with a mean of 181 cm181 cm and a standard deviation of 8 cm8 cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
Measurements made on the internally compensated amplifiers listed below provide the dc gain and the frequency at which the gain has dropped by 20 dB. For each, what are the 3 dB and unity-gain frequencies?
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