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The histogram shows the lengths of hospital stays (in days) for all the female patients admitted to hospitals in New York during one year with a primary diagnosis of acute myocardial infarction (heart attack).
a) From the histogram, would you expect the mean or median to be larger? Explain.
b) Write a few sentences describing this distribution (shape, center, spread, unusual features).
a company that produces dvd drives has a 9 defective rate. let x represent the number of defectives in a random sample
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores? a. above .10; b. below .10
A sample of 900 computer chips revealed that 76% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 78% of the chips do not fail in the first 1000 hours of their use.
One study, based on responses 1,014 randomly selected teenagers, concluded that 39% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of all teenagers in the populat..
consider the following. give your answers correct to two decimal places.a determine the value of the confidence
What is the expected total weight of 100 randomly chosen babies? What is the standard deviation of the total weight of 100 randomly chosen babies?
Consider the sample data for plants A, B, C & D of the above company, which are tabulated in table 1. Test whether the four means are equal at the 5% level of significance
which statistical technique one-way anova regression analysis chi-squared do you suggest to be used to answer this
in the last decade society in general and the judicial system in particular have altered their opinions on the
a binomial distribution has 50 trials n 50 with a probability of success of 0.50 ?0.50. we would like to find the
Use the sample summary statistics in the output to verify the value for t in this case. What is the p-value corresponding to your alternative hypothesis?
suppose a fast food restaurant wishes to estimate average sales volume for a new menu item. the restaurant has analyzed
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