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A survey found that Americans generate an average of 19.8 pounds of glass garbage each year. Assume the standard deviation of the distribution is 2.9 pounds. Find the probability that the mean of a sample of 16 families will be between 18 and 19 pounds.
1. in a statistical test of hypotheses we reject the null hypothesis at alpha ifa the p-value is smaller than alpha.b
a box of candy contains 25 candy bars of which 10 contain peanuts and 15 do not contain peanuts. if you select five
A Tamiami shearing machine produced 8 percent defective pieces. The quality control engineer has been checking the output by almost continuous sampling. What is the probability that in a sample of 9 pieces:
currently available medication is -9.4 minutes with a standard deviation of 2.8 minutes. Construct a 95% CI for the mean difference in times between the experimental and currently available medication.
Develop a stem-and-leaf chart. Summarize the number of times each ATM was used. What was the typical, minimum, and maximum number of times each ATM was used?
An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40.
the compressive strength of concrete is being tested by a civil engineer. he tests 12 specimens and obtains the
A random sample of 11 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows:
let x be binomial with parameters n15 and p.2a find the expression for density for xb find the expression for the
Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..
write a linear programming model fo the following linear programming problem. do not solve simply set up.the new age
use the following sample data to test whether the GPA are different at the 0.05 level of significance.
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