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Timetech, Inc., has been experimenting with different approaches to improving the performance of its field sales force. In a test involving salespersons in Maine, the company found that giving sales leaders a free snowmobile caused a sales increase of 25% in that state.
The experiment in Maine was so successful that company executives are now planning to increase sales nationwide by awarding free snowmobiles to sales leaders in all 50 states. Critique the external validity of this experiment.
a teacher instituted a new reading program at school. after 10 weeks in the program it was found that the mean reading
Draw the frequency polygon for these data using an initial class boundary of 21.5, an ending class boundary of 46.5 and 5 classes.
(a) What is the estimated percentile for a student who scores 705 on Critical Reading? (b) What is the approximate score for a student who is at the 34th percentile for Critical Reading?
If we select a crew member at random, what is the probability the crew member earns:
If a particular word is stored in n different places in the memory, what is the probability that this word cannot be recalled if one-half of the memory is erased by electromagnetic radiation?
Ethnic Group A: N = 15 M= 55 S2 = 6.5 Ethnic Group B : N = 23 M= 51 S2 = 4.5. If the standard deviation of the distribution of the difference between means is .76, what is the t score?
the average of chemical engineers is 39yrs with a standard deviation of 4rs. if an engineer firm employs 24 chemical
(a) Find the lower and upper quartiles, median, and interquartile range. Check for any outliers and interpret. (b) Construct a box plot and interpret. (c) Are there any outliers?
If the P-value of a hypothesis test comparing two means was 0.25, what can you conclude? (Select all that apply):
If one or the other has to be right, what probabilities would we assign to their claims if it were found that 11 of 12 newly hired teachers stayed with the school for more than a year?
Calculate the mean, median, and standard deviation for ounces in the bottles and construct a 95% Confidence Interval for the ounces in the bottles.
for a normal distribution find the probability that an observation falls within 0.92 standard deviations of the
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