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Describe the advantages and disadvantages of quasi-experiments? What is the fundamental weakness of a quasi-experimental design?
Why are quasi-experimental designs used more often than experimental designs?
The Wall Street Journal reported some interesting statistics on the job market. One statistic is that 40% of all workers say they would change jobs
Tompkins Associates reports that the mean clear height for a Class A warehouse in the Unites States is 22 feet. Suppose clear heights are normally distributed
A psychology professor is interested in whether implementing weekly quizzes improves student learning.
According to the Yankee group, 53% of all cable households rate cable companies as good or excellent in quality transmission.
You are the marketing manager for Acme Lamp Company. Acme specializes in the manufacture of lamps (light bulbs) for industrial applications.
The Statistical Abstract of the United States published by the US Census Bureau reports that the average annual consumption of fresh fruit per person
The Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip.
A criminologist has developed a test to measure self-control. The test is normed so that it has a mean of 70 and a standard deviation of 20.
Sketch area under standard normal curve over the indicated intervals, and find the specified area.
A tax account has three choices for the method of treating one of a client's deductions. After this choice has been made, there are only two choices
Suppose that x has a distribution with µ= 72 and s= 8.
The interaction between the independent variable and the dependent variable. The same participants under the same conditions.
Medical: Blood Protoplasm - Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage.
A screening test for breast cancer was administered to 400 women with biopsy-proven breast cancer and to 400 normal women without breast cancer.
Of the prescriptions that were filled incorrectly, how was the mistake noticed? How many were found due to patient injury or death? patient noticed?
Suppose that the price of a non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum.
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds
Using the enclosed information, discuss a priori (data collection category definition before collection) and post hoc.
Suppose a sample of n = 50 items is drawn from a population of manufactured products and the weight, X, of each item is recorded
The World Health Organization has reported that systolic blood pressures of Canadians are normally distributed with a mean of 121 and a standard deviation of 16
Bill and Joe are playing a match in which the first player to win 2 games wins the match. For any given game, the probability that Bill wins is 1/3.
A total of 2,406 surveys were distributed by the Town of Suhuarita Parks and recreation Department to gain a clearer understanding.
If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean