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Which of the following sampling procedures represents non-probability sampling?
a. The researcher obtains a sample of subjects from his own patient group because they are easy to find.
b. The researcher first splits the population into different groups (or strata) and then randomly samples from each group. The researcher randomly samples from the entire population.
c. The researcher first assigns a number to all potential subjects, and then selects every 5th person in the population in order to obtain a sample of 1,500 subjects.
in order to receive a merit raise a computer clerk must average 15 minutes or less per order form processed. an
the ceo of the engine manufacturer wants to reassure customers. he promises that in the next month there will not be
waiters at finegolds restaurant and lounge earn most of their income from tips. each waiter is required to tip-out a
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Which one of these statements concerning the creation of frequency tables for integer data is true? The procedure for creating them is the same as that for creating tables for qualitative data.
the transportation safety authority tsa has developed a new test to detect large amounts of liquid in luggage bags.
You can allow the cup to overfill 10% of the time. What amount should you set as the mean amount of coffee to be dispensed?
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
A simple random sample of 30 repairs made by this company is taken. The sample average is $97, and the SD is $17. Assume that the repair cost has a normal curve.
in each exercises hypothesis tests are proposed. for each hypothesis test aidentify the variablebidentify the two
on a certain legislative committee 38 of the members are republicans. if 23 of the members are men and 35 of the men
A certain medication is known to increase the pulse rate of its users. The variance of the pulse rate is known to be 10 beats per minute.
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