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During the past three weeks sales of a brand of medicine have been as follows:
Week
Sales
1
71
2
70
3
69
Using exponential smoothing with a smoothing constant of .10, forecast sales for week 4. (Note: Round answer to the nearest whole number of sales)
72
suppose that a random sample of 50 bottles of a particular brand of cough syrup is selected and the alcohol content of
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0.
Two boats the prada (Italy) and the oracle (USA) are competing for a spot in the upcoming Americans cup race. They race over a part of the course several times. Below are the sample times in minutes at the .05 significance level.
Find out equation of the line of best fit. Find out r - Is there a strong relationship?
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
Researchers studying infant head circumferences (in centimeters) wish to test if the mean head circumference differs from the historical mean of 34.5 cm. The researchers obtain a sample of 17 infants with a mean head circumference of 34.16 cm and a s..
The time, in hours, that a copying machine may work without breaking down is the normally distributed random variable with mean 549 and the standard deviation 68.
Why might the assumption of independence be violated? (b) Why might a driver be tempted not to use a seat belt "just on this trip"?
Test whether there is difference in the proportion of viewers using Chi square test.
A number of years ago, there was a popular television game show called Let's Make a Deal. The host Monty Hall, would randomly select contestants from the audience and, as the title suggests
1. the rmse also known as sigma is 10.0 and r 2 0 . 32 . the number of cases was over 12000. the autism i score
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