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An experiment consists of tossing three unfair coins, where the probabilty of tossing a head on each is 2/5. Construct the probabilty distribution for this experiment where the random variable x denotes the total number of heads observed on the three coins. what is the expected value of x?
Laura wanted to build a multiple regression model based on advertising expenditures and Coffee Time's price index. Based on the selection of all normal values, she obtained the following:
Over the interval 9.5 to 12.5 gallons per minute. Find the probability that between 10.0 gallons and 11.0 gallons are pumped during a randomly selected minute.
A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 175 and a standard deviation of 15. If an applicant is randomly selected, find the probability of a rating that is between 150 and 200.
How large a sample size, n, should they recruit in order to obtain a confidence interval with margin of error ± 3% based on this prior guess?
Test at 5% and 1% whether the molder is operating satisfactorily.
Calculate the paired sample t statistic for these mood scores and How has the relation between the mean and the median changed? What does this suggest about the distribution of the transformed data?
1.on november 26 1995 the minneapolis tribune ran an article on gender differences in shopping behavior. when 400 women
Suppose you want to test the null hypothesis, H0: μ=48, using a sample of n=70 cable shoppers. Find the p-value of a two-tailed test if x=49.1 and s=6.8.
You are investigating the flight characteristics of different kinds of birds. You collect a sample of 33 European swallows (Hirundo rustica) and measure their air-speed velocity in a borrowed wind tunnel.
About what percent of the observations lie between 55 and 65?
How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation?
A standard deviation of .15 million people. What is the proportion of these newscasts having between .9 million and 1.5 million viewers?
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