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Customers arrive at a checkout counter in a department store according to a Poisson distribution at an average of seven per hour. What is the probability that exactly two customers arrive in the two hour period of time between 2:00pm and 4:00 pm (one continuous two hour period)?
Test the hypothesis that the proportion of all student cell phone users in the United States who own a smartphone is 35%. Use the 5% level of significance and report your results.
for any normal distribution what z-score separates the highest 80 of the scores from the rest of the distribution?
What role do z-scores play in this transformation of data from multiple distributions to the standard normal distribution? What is the relationship between z-scores and percentages?
Solve the following questions involving fundamental operations on polynomials: Solve the following problems involving applicatins of polynomials:
If you select a random sample of 100 voters, what is the probability that a candidate will be forecast as the winner when. The true percentage of her vote is 50.1%?
The original concepts of analysis of variance came from the work of Sir Ronald A. Fisher, an English statistician. This technique, better known as ANOVA, has become one of the most commonly used research methods for testing differences among sever..
In general how is the magnitude of the standard error of estimate related to the value of correlation?
a) Explain why it would be hard to take a Simple Random Sample? b) Describe how to take a cluster sample of chocolate chip cookies.
Find the percent of a standard Normal model found in the given region. Round to the nearest hundredth of a percent.
Use Excel and the data to test whether the mean alcohol expenditures for UCM students is equal to that of SBU students using a 1 % level of significance.
Assume that these two ways to buy tickets are independent. The probability that someone who tries to buy tickets through the Internet AND by phone will obtain tickets is equal to?
A Variable has a mean of 100 and a standard deviation of 16. Four observations of this variable have a mean of 108 and a sample standard deviation of 12. Test whether the sample has been drawn from the population.
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