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A sample of 115 randomly selected students, found that the proportion of students planning to travel home for Thanksgiving is 0.71. What is the standard deviation of the sampling distribution?
the mean amount spent by a family of four on food per month is 700 with a standard deviation of 85. assuming that the
A student earned grades of 92, 79, 93, and 74 on her four regular tests. She earned a grade of 79 on the final exam and 88 on her class projects. Find the range, variance, and standard deviation for each of the two samples, then compare the two set..
A person is considering purchasing the stock of two home health companies that are similar in all respects except the proportion of earnings paid out as dividends.
professor fair believes extra time does not improve grades on exams. he randomly divided a group of 300 students into
a contractor purchases a bulldozer for 36500. the bulldozer requires an average expenditure of 5.25 per hour for fuel
Suppose that in fact 8% of the apples on the truck do not meet the standards. What is the probability that the shipment will be accepted anyway?
the thickness of photo resist applied to wafers in semiconductor manufacturing at a particular location on the wafer is
Define "operational definition" of a variable. Give at least two operational definitions of the variables you thought of in the previous review question.
estimating the combined mean values for the given data.one sample of n 4 scores has a mean of m 10 and a second
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
Design an experiment using a staged manipulation to test the hypothesis that when people are in a good mood, they are more likely to contribute to a charitable cause. Include a manipulation check in your design.
Construct a frequency histogram for the interarrival times. Is the data skewed to the right? Give your opinion on whether the phishing attack against the organization was an ‘‘inside job.''
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