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A major company would like to assess the impact of using a professional trainer to conduct a confidence-building workshop with its salespeople. A sample of 16 workers is obtained. Half (n = 8) attend the workshop and the other half (n = 8) serves as a control group. Two weeks later, each of the participants is given a questionnaire measuring the level of self-confidence. The data are as follows:
Controls
Workshop
M = 17.5
M = 22.7
SS = 100
SS = 124
Use the sample data to construct an 80% confidence interval for the mean difference in confidence between the control group and the workshop conditions.
Suppose that 800 jawbreakers are selected at random from the production lines. Would it be unusual for this sample of 800 to contain 406 jawbreakers that weigh more than .4 ounces?
People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. Only 7% of the American population have O-negative blood.
The margin of error in the poll was reported as 6 percentage points (with a 95% degree of confidence). Which statement is correct?
there are 2r 2r is less than or equal to n gloves randomly chosen from n distinct pairs of gloves i.e. 2n gloves in
a recent study of robberies for a certain geographic area showed an average of 1 robbery per 20000 people. in a city of
The discussion surrounding the ANOVA is very important. This is a widely utilized statistical tool. What is the ANOVA? What is the purpose of the ANOVA? What role does variation have in the discussion? What is the purpose of the F distributio..
Solve manually and then by mega stat. Indicate your decision rule, your hypotheses and your statistical and management conclusions."
questionred fishbluefishisanoutdoorwaterfronteateryinvictorias inner harbour
A local computer sales office sent the following information about the computer system installation. Identify the critical path by computing the ET, LT, TS and FS values.
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
youre organizing a party for which you send out 60 invites saying each invitee is allowed to bring one additional guest
Interpret the estimated coefficient for the toxemia variable and what are the odds of a hemorrhage for infants whose mother had toxemia?
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