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How large a sample is needed to guarantee that the distribution of sample means is approximately normally distributed? Why?
Among the contestants in a competition are 35 women and 20 men. If 5 winners are randomly selected, what is the probability that they are all men?
According to the website of mars, 21% of m&m's produced are green. suppose 4 candies are selected at random and number of green recorded create a probability distribution for this situation.
A random sample of 4000 U.S. citizens yielded 2190 who are in favor of gun control legislation. Find the point estimate for estimating the proportion of all Americans who are in favor of gun control legislation.
Test the hypothesis that no difference exists between the groups at α = .05 and perform and report all related tests and statistics.
If you were to accept the null hypothesis, even though the null hypothesis was false, what type of error would you have commited?
A computer is used and it is found that the P-value = 0.0016. What can you state about the sample (independent or dependent) and what can you conclude about the evidence?
The McBurger restaurant chain claims that the waiting time of customers for service is normally distributed with a mean of 3 minutes and a standard deviation of 1 minute.
A random sample of n=9 men between 30-39 years old is asked to do as many sit ups as they can in one minute. The mean number is x=26.2 and the standard deviation is s=6. Find a 95% confidence interval for the population mean.
What type of solution do you get for a quadratic equation where D
In a Singapore Edition of Business Times, diamond pricing we explored. The price of a diamond is based on the diamond's weight, color, and clarity. A Simple random sample of 18 one-half-carat diamonds had the following prices, in dollar's:
Compute the cofficient of determination. Compute the correlation coefficient between the price and the number of pages.
Use a 95% CI to estimate the difference between the proportions of men and women managers who are married. Interpret the interval and what is the conclusion in terms of the populations from which the samples were drawn.
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