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In a certain binomial distribution, π = 0.20 and n = 30, In using the normal approximation,
a. What are the mean and standard deviation of the corresponding normal distribution?
b. If the number of "successes" among the 30 observations, determine the following:P(x = 5), P(4 ≤ x ≤7), P(1 ≤ x ≤ 5), P(x ≥ 7).
Select the appropriate word to identify whether the measurement represents a categorical variable or a quantitative variable: The average number of minutes a person watches television each day.
represent a summary of a random sample of size 50 from a Poisson distribution. Find the maxim um likelihood estimate of Pr ( X = 2).
The use of both test is desired to ensure the reliability of the observations, when the above/below shows if there is a tendency the median, where up/down shows the observation in proportion to each other.
Describe a business situation where you would want to use a t-test. Why would you choose that test? What would you expect to show by doing this?
According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then.
If two cards are randomly drawn (without replacement) from an ordinary deck of 52 playing cards, Z is the number of aces obtained in the first draw, and W is the total number of aces obtained in both draws, find
Is there a difference in the extent of wound healing by treatment? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance.
You are having a meeting with the employees of Financial Outsourcing, Inc. During the meeting, you were asked several questions. Give your opinion to the questions.
A random sample of 150 voters yields 87 who support her. The candidate wishes to test her claim at the 0.05 level of significance. Compute the value of test statistic.
the correlation between the temperature in celsius and temperature in fahrenheit.the correlation between hours of sleep
What is the probability that the number of women who never eat breakfast is at least as large as the number of men who never eat breakfast?
Do the data provide suf?cient evidence to indicate that the mean Hb level for children with chronic diarrhea is less than that of the normal value of 14.6 g/dL? Test the appropriate hypothesis using α = 0.01. Draw a box plot and normal plot for th..
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