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A professor has a teaching assistant record the amount of time (in minutes) that a sample of 16 students engaged in an active discussion. The assistant observed 8 students in a class who used a slide show presentation and 8 students in a class who did not use a slide show presentation.
With MicrosoftPowerPoint WithoutMicrosoftPowerPoint
14 68 184 239 1519 1012 115 217 13
Use the normal approximation for the Mann-Whitney U test to analyze the data above. (Round your answer to two decimal places.)
z = ___________
State whether to retain or reject the null hypothesis. (Assume alpha equal to 0.05.)
Retain the null hypothesis.
Reject the null hypothesis.
Find the odds for and the odds against the event rolling a fair die and getting a 4 comma a 5 comma a 2 comma or a 3.
Determine the t values that form boundaries of critical region for two-tailed test with a = .05 for each of the given df values.
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
Examine the data from the 30 MLB teams during the 2009 season. We will search for linear relationships between potential explanatory variables.
a random variable is normally distributed with a mean of 25 and a standard deviation of 5. if an observation is
Post an example of a practical application of regression analysis. Identify the independent and dependent variables.
The Dean is hanging his head in shame. He realizes his failings in designing an adequate research design to assess the effects of the move on majors and has revised the proposal.
Late arrivals. Will your flight get you to your destination on time? The U.S. Bureau of Transportation Statistics reported the percentage of flights.
PSYC 220 Assignment - Calculate the Sum of Squares, the variance and the standard deviation for this sample. Calculate the mean and the range
A July 2009 Pew Research Center survey asked a variety of science questions of independent random samples of scientists and the public at-large.
a new no-frills airline runs a commuter shuttle service using a refurbished world war ii bomber. the two-propeller
Convert these four officers' scores to standardized z-values.Do you believe there was adequate reason to question these four exam scores? What suppositions are you making?
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