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The average buglary rate for a juisdiction has been 311 per year with a standard deviation of 50 what is the probability that next year the number of burglaries will be more than 350
What can you conclude about the effects of operators and machines on breaking strength? Explain. g) repeat the anaylsis, suing machines as the only factor. Compare results to those of c, e, and f.
Length of country & western song is normally distributed and has a mean of 200 seconds and a standard deviation of 30 seconds. Find the probability that a random selection of 9 songs will have m
Assume that the population standard deviation is 4 minutes. The 90% confidence interval for the population mean of waiting times is?
If you take a piece out of the bag at random, what is the probability it is green? What is the probability it is blue? What is the probability that you will eat it?
In a meat packaging plant, Machine A accounts for 60% of the plant's output while Machine B accounts for 40% of the plant's output. 1% of the packages from Machine A are improperly sealed while 2% o
A bag contains five balls numbered from 1 to 5. Plot the cumulative distribution function (cdf) of X. What is the value of P(X≤3.65)?
80 indicatedthey like the taste. at 5% significance level, test to determine if at least 22% of the population will like the new soft drink. determine the p-value.
In china, the probability if a baby being a boy is 0.5845. Couples are allowed to only have 1 child. If relatives give births to 5 babies, what is the probability that there is at least one girl? Ca
But cases can only be produced in the morning before the store opens. If you wish to maximize expected profit, how many cases should be produced each day?
What is the explanatory variable, what is the response variable, and what is the carry over effect if any? Is this an example of a matched pair?
Is there enough evidence to substantiate that residents of Wilmington, Delaware have more income than the national average at the .10 significance level?
Twelve people are in a study to compare two methods of caffeine use--caffeine pills and coffee use. Each of the 1 are randomly chosen to use either the caffeine pills or drink the coffee.
The weight of a .5 cubic yard bag of landscape mulch in uniformly distributed over the interval from 38.5 to 41.5 pounds. Give a mathematical expression for the probability density function.
Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to try to prove that more than half of all mobile phone users are now using the mobile Internet.
The owner of a grocery store finds that she sell 980 gallons of milk each week at $2.69 per gallon and 1220 gallons of milk each week at $2.49 per gallon.
The mean weight of loads of rock is 5l.0 tons with a standard deviation of 12.0 tons. If 25 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is
How many of the store's credit card holders need to be selected to have 90% confidence of estimating the population proportion to within +0.045?
suppose that you are purchasing cases of wine and that periodically you select a test case to determine the adequacy of the bottles' seals. To do this you randomly select and test 3 bottles int he c
Finally, provide a graphical and written description (in words) of the graph for a layperson. Explain what the data revew about the length of time to complete a driver education test.
Random samples of size 64 are taken from a large population whose mean is 160 and whose standard deviation is 25. What is the mean of the sampling distribution of the sample mean?
How large a sample n would you need to estimate p with margin of error 0.01 with 95% confidence? Use the guess p = 0.5 as the value for p.
Bags of cookies that have weights in the upper 8.5% are too heavy and must be repackages. what is the most a bag of cookies can weigh and not need to be repackaged?
If we select 92 students (ASSUME INDEPENDENCE), what is the Standard Deviation of the Probability Distribution that would list the number of students.
An auditor for Health Maintenance Services of Georgia reports 40% of policyholders 55 years of older submit a claim during the year. Fifteen policyholders are randomly selected for company records.