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You take a random sample of 100 pins from the lot supplied by the vendor and test them. You find 8 of them defective. What is the 95% confidence interval for percentage defective in the lot?
what is the probability of having the same number when rolling two dices? what is the probability of having at least
Last week you posted the topic of your research, your initial predictions, and how you would go about finding that data. Now it is time to report your initial results and analysis.
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F. Is body temperature of 99.00 °F unusual? Why or why not?
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
an investigation of the effectiveness of a training program to improve customer relationships included a pre-training
Sample data was collected in a study of calcium supplements and their effects on blood pressure. A placebo group and a calcium group began the study with blood pressure measurement.
Clothing retailer. Since the average purchase amount Purchase12 was such a good predictor, the manager would like you to consider another explanatory variable: the average purchase amount from the previous 12 months. Create the new variable
compute a 95 confidence interval for the population mean based on the sample 1 2 3 4 5 6 and 39. change the number from
the owner of the pizza palace wishes to include in an advertisement a statement about the number of different kinds of
What method of random selection can be used to determine which women to select in quantitative research?
an airline has an advertisement that states ...our passengers always receive their bags within 20 minutes after the
The accounting department at Weston reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours... Determine the z values for 29 and 34 hrs. What percent of garages take between 32 and 34 hrs to erect.
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