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A piece of rope is made up of 100 strands. Assume that the breaking strength of the rope is the sum of the breaking strengths of the individual strands. Assume further that this sum may be considered to be the sum of an independent trials process with 100 experiments each having expected value of 10 pounds and standard deviation
1. Find the approximate probability that the rope will support a weight(a) of 1000 pounds.(b) of 970 pounds.
What is the probability that a randomly selected group of 50 shoppers will spend a total of more than $5700? The total will be more than $5700 when the sample average exceeds what value?
These are the winning percentages for 11 baseball players for each one's best 4-year pitching performance: Compare the mean and median. Does the differencebetween them suggest that the data are skewed very much
The standard deviation, over a long period of time, was computed to be 0.150 mm. What percent of the ball bearings on this line will have diameters of 20.27 mm or more?
in the game of roulette a steel ball is rolled onto a wheel that contains 18 red 18 black and 2 green slots. if the
What are post hoc comparisons, and why do researchers make them? Why do researchers not use the Bonferroni procedure of procedures for post hoc comparisons?
The standard deviation of all possible x values is called the?
Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes.
Calculate P(X . What is the probability that X will exceed 0.5? Given that X > 0.5, what is the probability that X will be less than0.75?
Explain how the use of the hypothesis testing can be used to evaluate solutions to the research issue.
question the data set represents the income levels of the members of a country club. estimate the probability that a
How many customers must the restaurant have, on the average, to be at least 95 percent sure that the number of customers ordering pie on that day falls in the 19 to 21 percent range?
Consider the following data for two independent random samples taken from two normal populations. What is the 90% confidence interval estimate of the difference between the two population means?
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