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In a large statistics class, the professor has each person toss a fair coin 15 times and calculate the proportion of their tosses that were heads. The students then report their results, and the professor plots a histogram of these several proportions.
a) What shape would you expect this histogram to be? Why?
b) Where do you expect the histogram to be centered?
c) How muck variability would you expect among these proportions?
d) Explain why a Normal model should not be used here.
Give a 90% confidence interval for the average number of empty seats. Use the sample standard deviation rounded to 3 decimal places.
flaws in a certain type of drapery material appear on the average of three in 250 square feet. if we assume the poisson
If the observed value is 4, the expected value is 5, and the standard error is 4, then the test value used for the z test is equal to
If we randomly select two candies from the dish without replacement, what is the probability that we get one cherry candy and one grape candy
A machine is made up of two independent components placed in series. The lifetime of each component is uniformly distributed over the interval [0,1].
Assuming that the spot rate in 60 days is $.72, what is the net amount paid, assuming the company wishes to minimize its cost??
Determine whether the following are demonstrative definitions, enumerative definitions, definitions by subclass, synonymous definitions, etymological definitions or operational definitions.- "Dessert" means something such as pie, cake, cookies, o..
Taking air samples at random times during a 2-month period, an environmental group finds the standard deviation of ozone concentration measurements in the vicinity of a chemical plant to be 0.03 parts per million (ppm).
Let us assume that the average score in a class is normally distributed with a mean of 78 and standard deviation of 5.5.
Compare and contrast fascism and Nazism and their rise. Why might one be more effective than the other at attracting support?
Use the data to estimate the probability distribution of the daily sales.- Calculate the mean of distribution obtained in part (a).
A report issued by the American Association of Building Contractors indicates that 40% of all home buyers will do some remodeling to their home within the first 5 years of home ownership. Assuming this is true, use the binomial distribution table ..
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