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In a distribution of fingernail length where n= 196, σ = 7 & x bar = .75, compute a 92% Interval Estimate. & determine if Zelda, whose nails are 1.87 long, will be within the interval?
Suppose that five escalator riders are selected at random. What is the probability that three of the five take at least 2 minutes and 20 seconds to ride the escalator?
What are primary and secondary data sources of market information? Which should be conducted first? Explain what is data mining?
in exercises 9.55-9.60 we have given the value obtained for the test statistic z in one mean z-test. we have also
The probability of drawing two diamonds (to complete a flush) after discarding the 5 and 7.
Create one table that calculates summary measures of the change in test scores and income variables across all 80 schools.
in statistics is the cumulative distribution function always
Assume the probability of a tire blowout is 0.178% per 50,000 miles of use and that a person travels 15,000 miles per year in a car.
A random sample of 160 car crashes are selected and categorized by age. The are listed below. The age distribution of for the given categories is 18% for under 26, 39% for 26-45, 31% for 46-65, and 12% for over 65.
Each of the given z-scores, draw the normal distribution and sketch the vertical line at location of z-score, then find out whether body is to right or the left of line and determine the proportion in the body.
a completely randomized experiment with two temperatures factor a two lengths of washing time factor b and five
thirty 30 students were asked if they voted for hilary clinton or john nosh for president. eighteen 18 said that they
find poisson approximations to the probabilities of the following events in 500 indepen- dent trials with probability
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