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There are 2 groups of education majors. they are all assigned to study a diverse neighborhood where their internship will be.
You notice in your introductory psychology class that more women tend to sit up front, and more men in the back. To determine wheather this difference is significant, you collect data on the seating
Find the z-score location of vertical line that separates normal distribution as described in each of the following 20% in the tail on the left.
Determine the sample size necessary to estimate a population proportion to within .01 with 90% confidence assuming you have no knowledge of the approximate value of the sample proportion.
A random sample of 25 was drawn from a normal distribution whose standard deviation is 5. The sample mean is 80. Determine the 95% confidence interval estimate of the population mean.
If a particular man has a history of hitting the center of the target with 90% of his shots, what is the probability of the following? He will hit the center of the target with all five of his nex
When they lose the series, they win the first game 25% of the time. The first game is over; your team has lost. What is the probability that they will win the series?
Determine the probability of a crash with at least one fatality if a driver drives while legally intoxicated (BAC greater than .09).
The mean resting pulse rate for a large group of varsity athletes was 72 with a standard deviation of 9.46. What percentage of the group had pulse rates of 70 or lower?
What is the probability that the average time to failure for 30 randomly chosen components will be less than 5000 hours?
Random sampling from two normal populations produced the following results:
State the null and alternative hypotheses you would use to test whether the year-end bonuses paid by Jones & Ryan were different from the population mean.
If one extra component is installed as a backup, what is the probability of at least one of the two components working for at least 60 hours?
Test with alpha = .05 to determine whether we can infer that the population means differ
Let A be the event that both are either a jack, queen,king, or ace of hearts, and let B be the event that both are aces. Are A and B independent? Why or why not?
What is the probability that a male student will graduate within five years? Given the preceding results, what are the percentage of women and the percentage of men in the entering freshman class?
Travelbyus is an Internet-based travel agency wherein customers can see videos of the cities they plan to visit. The number of hits daily is a normally distributed random variable with mean of 10,0
As the number of trails in a binomial distribution application becomes large, what is the advantage of using the normal approximation of the binomial distribution to compute probabilities?
Given a binomial random variable with n=10 and p= .3, use the formula to find the following probabilities:
What is the probability of a patient dying within 24 months of being discharged after treatment for a heart attack?
Let T be the event the company is headquartered in Texas. Find P(T). Let B be the event the company is headquartered in one of these six states. Find P(B).
Calculate a regression that examines whether or not you can predict if a student wants a lecturer to be extroverted using the student's extroversion score.
What is the probability that the sample proportion of adults using the Internet will be within .04 of the population proportion?
Based on 100 samples, the actual strength of the soil samples are as follows: 30 of the samples had a low strength, 40 had a medium strength, and 30 had a high strength.
A consulting firm has to make a decision concerning bidding on a major project that has a projected profit for the firm of $100,000.