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A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus. This variable, travel time, was then used conduct a test of hypothesis. The goal was to determine if the average travel time of all the university's students differed from 20 minutes. Suppose the large-sample test statistic was calculated to be z = 2.14. Find the p-value for this test of hypothesis.
The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described wit a normal model.
Determine the probability of randomly selecting a person graduating with Master's degree who didn't major in Education.
Create a 99 percent confidence interval for mean daily intake of milk. You may suppose daily intake amounts are usually distributed.
the time t between emissions radioactive emissions has an eponential distribution with a mean of 4 seconds between
oh has 15 residents 10 are democrats. in a sample of 4 different voters what is the probability that exactly 3 are
What is the formula is for a population with a mean of u=60 and a standard deviation of sigma=24. Find the z score corresponding to the sample m=63 for a sample of n =16 scores,.
Simplify the principal square root of 64 z^4. Assume that z represents a positive real number.
How do we decide if the homogeneity of variance assumption is significantly violated?
multiple choice question based on multiple regression.in a regression model involving 30 observations the following
q1. the discussion surrounding the anova is very important. this is a widely utilized statistical tool. what is the
Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find: (a) the probability that Pickwick has no umbrella, given that it rains.
Let X and Y have a bivariate normal distribution with parameters u1 = 20, u2 = 40, sigma1^2 = 9, sigma2^2 = 4, and p = 0.6. Find the shortest interval for which 0.90 is the conditional probability that Y is in the interval, given that X = 22.
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