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Alison, the owner of a regional chain of pizza stores, is trying to decide whether to add calzones to the menu. She conducts a survey of 700 people in the region and asks whether they would order calzones if they were on the menu. 46 people responded "yes." Make a 90% confidence interval for the proportion of people in the region who would order calzones if they were on the menu. Round your answer to four decimal places.
The number of complaints that a dry-cleaning establishment receives per day is a random variable having a Poisson distribution with λ = 3.3. Use the formula for the Poisson distribution to find the probability that it will receive only two compla..
find the minimum sample size you should use to assure that your estimate of will be within the required margin of error
Evaluate a test statistic for the null hypothesis H0: μ = 30 against the two-sided alternative hypothesis H1: μ _= 30, and by plotting this on its reference distribution, identify and calculate the corresponding p-value associated with H0. What ar..
You test a now drug to reduce blood pressure. A group of 15 patients with high blood pressure report the following systolic pressures (measured in mm Hg):
What is the probability that there will be more than 6 accidents in a 1-hour period? What is the probability that there will be at most 2 accidents during the 2-hour busy period on a particular day?
As sample size increases in the treatment and control groups of a study, what effect will that have on the size of the standard error of the difference?
assume that 64 of twins are of the same gender. given that a newborn set of twins is of the same gender what is the
Is coffee the key to success in a f2f Stat 200 class? (Would it be necessary in our on-line course?) FINALLY, what are some of the flaws in this observational analysis? How might it be better designed
Perform the necessary calculations to determine which of the two mutual funds is better. Which one should you choose to maximize the expected value?
The time to complete a standardized exam is approximately Normal with a mean of 70 minutes and a standard deviation of 10 minutes.
How many different groupings can be made for a national championship college footbal playoff pool from 25 teams if only the top 4 make the grouping
If p(A)=p(B)=0.25, and A and B are independent.
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