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A physician is planning to take systolic blood pressure measurements from a group of office workers and a group of repair personnel working for a telephone company.
Past results indicated that c is approximately 15 mmHg. If it is desired to have a 95% confidence interval of length 4 mmHg, how many workers should be measured in each group?
Find the mean for the random variable X, the number of students who work full time in sample of size 16. Please round your answer to two decimal places.
Calulate the critical value of ra. (f) Can you reject p = 0? 12.4 Moviegoer Spending ($) on Snacks Age (X) 30,50,34,12,37,33,36,26,18,46. Spent (Y) 2.85,6.50,1.50,6.35,6.20,6.75,3.60,6.10,8.35,4.35.'
Suppose that the two lists are combined to produce a new list of 18 values. What is the average (mean) of this new list?
A survey of 120 high school students shows that 39 of them work over 20 hours per week during the school year. Does it demonstrate the conjecture that more than 25% of the high school students work over 20 hours per week during the school year?
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
as of october 2009 the united states federal dept was 11963668027500. if each of the 307000000 people in the united
Suppose that inspection is conducted only after the first and second operations. Nonconforming parts are not forwarded to the next operation. What is the unit cost per acceptable part?
As a way of fund raising, you decide to set up a hot dog stand, after a few weeks of doing this you sell 8 hot dogs every 10 minutes.
an investment company pays 6 compounded semiannually. you want to have 12000 in the future.a how much should you
Does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket?
identify the type of sampling used random systematic convenience stratified or cluster. to estimate the percentage of
What is the probability that between 5 and 10 firms, inclusively, purchase a Unix machine from Sun Microsystems?
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