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The following frequency table summarizes the distances in miles of 100 patients from a regional hospital.
Distance Frequency
0-2 30
2-4 35
4-6 20
6-8 10
8-10 5
Calculate the sample variance and standard deviation for this data (since it is a case of grouped data- use group or class midpoints in the formula in place of X values, and first calculate the sample mean).
A baseball player gets a hit in 30 out of 100 times at bat. What is the probability that he gets a hit in his next at bat?
The researcher was interested in how well what he/she manipulated predicts how happy subjects feel at the end of the procedure. Using the data below, calculate the regression constants and present the equation for the regression line.
A demand function is known to be linear [P = f(Q)], and to pass through the following points: Q = 10, P = 50 and Q = 20, P = 30
Overtime happens after eight hours of work on given day. Determine the probability that letter carrier works overtime on any given day?
for the most recent year available the mean annual cost to attend a private university in the united states was 20082.
You are stopped at the checkpoint and, of course, have not been drinking. What s the probability that you are detained for further testing?
Which statement about re-expressing data is not true? I. Unimodal distributions that are skewed to the right will be made more symmetric by taking the square root of the variable.
A behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation.
Assume that in a hypothesis test with null hypothesis Ho: μ = 14.0 at a= 0.05, that a value of 13.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of:
Develop a probability distribution for the number of students in the sample who watch soap operas.
Three elements are randomly chosen out of the shipment. What is the probability that all three faulty elements will be the ones chosen?
raul received a score of 80 on a history test for which the class mean was 70 with standard deviation 10. he received a
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