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A consumer's right protection group suspects that local shopkeeper's 10g packs is actually less than wt. The group took sample of 40 whose mean wt is 9.95 and s.d. of 0.15. Find p-value for the test of hypothesis.
A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
Professor wishes to determine whether prior statistical knowledge assists students in their performance on the final exam. What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA. What SPSS test w..
Find the probability that he will answer at least 3 questions correctly.
The standard deviaiton is 2 pounds. If 15% of the suitcases are overweight, find the maximum weight allowed by the airline. Assume the variable is normally distributed.
Find out the following: Mean swipe rate, Standard deviation of the swipe rate.
A retail store manager is trying to estimate the average purchase transaction amount for a particular store. She takes a sample of 35 transactions and determines the mean purchase transaction amount from this same is $85 with a standard deviation ..
Compute mean and standard deviation for sample of N = 8 females and sample of N = 8 for males.
The regression of Y on X predicts? When predicting Y, adding a second predictor variable to the first predictor variable X.
Assume if the students toss the coin 200 times each about 68% should have proportions among what two numbers.
What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? What is the probability that a randomly chosen stock investor also invests in fixed income instruments?
PiggyBank has narrowed its options down to two incentive plans: The bank doesn't know whether consumers would shop online more than at clothing stores.
An economic researcher would like to know whether he can reject the null hypothesis at the 0.10 level, that no more than 20% of the households in Pennsylvania make more than $70,000 per year.
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