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Problem:
Four friends Janice Barbara kaitlyn and Roberta decide to carpool to school. Each day the driver would be chosen by randomly selecting one of the four names they carpool to school for 96 days use the normal approximation to the binomial to calculate the following probability
Find the probability that roberta is the driver for more than 16 days
Find the probability that barbara drives exactly 24 out of those 88 days
If a student randomly guesses at the answer to each question for every quiz, then what is the mean number of correct answers the student
A certain electronics company produces a particular type of vacuum tube. It has been observed that, on the average, three tubes of 100 are defective. The company packs the tubes in boxes of 400. What is the probability that a certain box of 400 tu..
The safety director of large steel mill took samples at random from company records of minor work-related accidents and classified them according to the time
Problem: The masses (in kilograms) of a sample of five boxes being sent by Purolator are: 13, 6, 7, 4 and 10.
Ethanol is getting wider use as car fuel when mixed with gasoline. A car manufacturer wants to evaluate the performance of engines using ethanol mix.
Suppose that a normal distribution with mean μ=6ml and standard deviationσ= 0.2 ml is a reasonable model for the distribution of the variable x= amount of red dye in the paint mixture. Use the normal distribution model to calculate the following p..
The population standard deviation is known to be 2.5. A survey of 45 campers is taken. The average from the sample is 6.75 with a sample standard deviation of 3.1. Find the 95% confidence interval for the population mean.
a. What is the mean, variance, and standard deviation of the aggregate donation, S?
A trout is randomly selected. What is the probability that its weight does not exceed 175g?
Find approximate 95% confidence intervals for the proportion and the percentage of adult Americans who would say they favor this experimentation.
a) If Catherine guesses the answer to each question randomly, state the exact distribution of X,number of answers Catherine gets correct.
In 1992, FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive.
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