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Heights of women follow a normal distribution with mean μ=63.6 inches and standard deviation of σ=2.5 inches.
Suppose random samples of 10 women are chosen and their mean height calculated. Please calculate the mean and standard deviation of the distribution of all such sample means.
What is the mean?
What is the standard deviation?
a survey from teenage research unlimited found that 30 of teenage consumers receive their spending money from part-time
Suppose that during a recent 35-year ?period, there were sixvolcanic eruptions sufficiently powerful to reduce the amount of power generated
What would you add to the current treatment plan? Why? Would you discontinue any of the currently prescribed medication? Why or why not?
a cell phone service provider has selected a random sample of 20 of its customers in an effort to estimate the mean
Find the test statistic that would be used for a test of H0: p = 0.3 versus Ha: p ≠ 0.3, given a sample proportion of 0.35 from a sample size of 200.
Travel and Transportation To advertise appropriate vacation packages, Best Bets Travel would like to learn more about families planning overseas trips.
What is the probability that the chosen manager will be either a woman or over 50 years old or both? Solve both directly from the data and by using the law of unions. What is the probability that the chosen manager will be under 30?
Consider a simple random sample of n=116 people. Denote by X the number of people in the sample that have the disease. Calculate the following probabilites. P(X=23)=?
Generally, what is the shape of the histogram for the variables that are well described by the Empirical Rule?
How much money do winners go home with from the television quiz show Jeopardy? To determine an answer, a random sample of winners was drawn and the amount of money each won was recorded and listed below
A man with n keys wants to open his door. He tries the keys independently and at random. Let Nn be the number of trials required to open the door.
Do a frequency table, histogram, normal Q - Q and the de-trended normal and Do descriptive statistics (mean, standard deviation, minimum, maximum) for each one of the 11 variables.
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