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Aa researcher calculates the expected value for the number of girls in three births. He gets a result of 1.5. He then rounds the result to 2, saying that it is not possible to get 1.5 girls when three babies are born. Is this reasoning correct? Explain.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? Compute the value of the test statistic.
Find the empirical probability that an iris bulb of this type will bloom. Give answer as a fraction in lowest terms. How many of the bulbs should she plant next fall if she would like at least 52 to bloom?
Share with your peers the null and alternative hypotheses for a decision that is relevant to your life. This can be a personal item or something at work.
A company is interested in evaluating its current inspection procedure on shipments of 20 identical items. They take a sample of 5 and accept the shipment if no more than the allowed maximum of the samples are found to be defective.
Z score on comparison distribution for sample score and your conclusion. Suppose that all population are normally distributed.
Finding Normal probabilities using standard normal table or Excel built in functions
The probability of going to college is 0.4. What is the probability that the proportion of women who go to college is greater than 50%.
Assume the earnings from this investment project is a normal distribution. What is the probability that you will lose money or earn nothing from this project.
Describe the population of interest and calculate the numerical value of the statistic that that the EPA will use to estimate p. Construct a 95% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of ..
Find the best point estimate of the mean salary of all NCAA football coaches.
If Procter & gamble sells about 20 million bars of soap per week, but the demand is not constant, and production management would like to get a better handle on how sales are distributed over the year. What might be helpful to the production and (..
The rate of defects among CD players of a certain brand is 1.1%. Use the Poisson approximation to the binomial distribution to find the probability that among 240 such CD players received by a store, there is at most one defective CD player.
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