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What is the average of sticks of gun he or she chewing daily was 8. To test the claim a researcher selected a random sample of 36 gum chewer and found the mean number of sticks of gum chewed per days was 9. The standard deviation of the population is 1 at a-0.05, is the number of sticks of gum a person chews per day actually greater that 8?
What is the 95% one-sided confidence interval for the average worker? What is the 95% predicted dose for a 95% one-sided confidence interval?
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
An election poll reported that a candidate had an approval rating of 48% with a margin of error E of 3%. Construct a confidence interval for the proportion of adults who approve of the candidate.
Scenario: Dole Pineapple, Inc., is concerned that the 16-ounce can of sliced pineapple is being overfilled. Assume the standard deviation of the process is .03 ounces.
How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation?
Make a relative frequency histogram by using ten-point intervals to show the distribution of the scores.
The standard deviation is thought to be $400. How many card holders should be sampled? Your company charges a set dollar amount for each account in the sample.
By letting the period be one month, one has D = 100, Cu = 2.5, Ch= 0.50, Cr = 3.50, Cs= 0.20 and L = 0.75. What is the optimal inventory policy and the total cost of the system under the optimal policy?
Find the third quartile Q3 of the list of 24 sorted values shown below. Which is relatively better: a score of 81 on a psychology test or a score of 50 on a economics test? Scores on the psychology test have a mean of 88 and a standard deviation of..
At a large commercial bakery, one of the measures used to evaluate employees is number of broken cookies per 1000 produced. The quality control department wants to determine if there is a relationship between years of experience and the broken co..
The probability that student pilot passes the written test for a private pilot's license is 0.7. Find the probability that the student will pass the test: (a) on the third attempt (b) before the fourth attempt.
A standard deviation of $125. A) what is the point estimate of the population mean? B) develop a 95% confidence interval for the population mean.
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