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3 section of a statistics class containing 28,32 and 35 students averaged 83,80 and 76 respectively on same final exam. what 's the combined population means of all the 3 sections ?
Eestimated values of the dependent variable observed values of the dependent variable and the estimated values of the dependent variable None of these answers is correct.
The clinic estimates that the true population standard deviation is around $2,100. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy.
Since purchasing the software the average delivery time over twenty delivery days was 8.6 hours. At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Out of 1000 people surveyed, 600 belonged to urban areas and rest to rural areas. Among 500 who visited other states , 400 belonged to urban areas. Test 5 % level of significance whether area and visiting other state are dependent.
If we were to ask three people at arbitrary, determine the probability that they will all prefer punk rock?
An experiment is designed using three levels of ground clutter and two filter types. The experiment is performed by randomly selecting a treatment combination
The probability that Pete will catch fish when he goes fishing is .8. Pete is going to fish three days next week. Define the random variable x to be the number of day Pete catches fish. (hint. binomial distribution)
If 9 measurements are randomly selected from this population, what is the probability that the sample mean will exceed 104?
If the standard deviation of the amount spent on books is $8.42, find these probabilities for a randomly selected American. Put answer in percent form.
Determine the control limits for the mean and the range. Plot the control limits for the mean outside diameter and the range.
Seniors as to how much they spent on textbooks in that term. The bookstore believes that the two groups spend the same amount. What is the test value?
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