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A simple random sample of 1088 adults between the ages of 18 and 44 is conducted. It is found that 247 of the 1088 adults smoke. Use a 0.05 significance level to test the claim that less than 1/4 of such adults smoke. Use P-value approach and determine conclusion.
Select one:
a. P-value = 0.960, fail to reject the null hypothesisb. P-value = 0.460, fail to reject the alternative hypothesisc. P-value = 0.080, reject the alternative hypothesisd. P-value = 0.227, fail to reject the null hypothesise. P-value = 0.040, reject the null hypothesis
A box in a certain supply room contains four 40 w light bulbs, five 60-W bulbs, and six 75-W bulbs. If two are randomly selected from the box and at least one of them is found to be rated 75-W.what is the probability that both of them are 40- W bu..
What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n= 25 third grade children and each child is given a standardized achievement test at the end of the year.
Use the Poisson distribution to approximate the probability that among 10,000 cars passing through this tunnel, at least one will have a flat tire.
After treatment is administered to individuals in sample, sample mean is found to be M = 55. Determine Cohen's d measure effect size for both tests (σ = 20 and σ = 10).
four automobiles have entered bubbas repair shop for various types of work ranging from a transmission overhaul to a
An analyst wishes to include number of older siblings in family as a predictor variable in a regression analysis of factors affecting maturation in eighth graders.
(a) What is the average cost per hour if Mary is hired? If Alice is hired? (b) Find C if the average cost per hour is the same for Mary and Alice.
suppose that the average life of a refrigerator before replacement is m 14 years with a 99.7 of data range from 8 to
Find the marginal PMF pY (y). Hint: One possibility is to start with the answer to part (c), but the algebra can be messy. But if you think intuitively about the procedure that generates Y , you may be able to guess the answer.
Interpret values of b1, b2, b3 and b4 in this estimated regression equation.
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