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Suppose we wanted to test the hypothesis that a control group of cancer patients (Group 1) would report higher mean pain ratings than an experimental group receiving special massage treatments (Group 2).
mean group 1 = 78.5 s21 = 42.1 n1 = 25
mean group 2 = 72.1 s22 = 39.7 n2=25
a. Compute a t-test for independent groups:
b. Using α=0.05 for a one-tailed test, is the t statistic significant?
c. Write one or two sentences (in plain English/non-statistical terms) that could be used to report the results obtained for the t-test.
The I Ching is an ancient Chinese system of asking for advice. In one version, three pennies are flipped, and if the number of heads is odd (1 or 3).
You have $380,000 in your bank account. The interest rate in your account is 5%. Solve for the following showing your work: How much interest will you accumulate if interest is compounded annually over the next five years?
the assignment 4 real estate data set has information on prices that houses sold for in five different towns. we want
Calculate the odds of bird defects in the two groups and the corresponding odds ratio. Interpret the OR in the context of the study.
A company's customer service 800 telephone system is set up so that the caller has six options. Each of these six options leads to a menu with four options.
What is the probability that the fiber will break at 1,500 cycles? What is the probability that the fiber will break at 2,500 cycles?
An investor is considering two brokerage firms. One is a discount broker offering no investment advice, but charging only $50 for the amount the investor.
Unknown to the purchasing manager, the drills on the truck require an average of 295 watts, with a standard deviation of 12 watts. Stating any additional assumptions you are using, find the probability that the truckload of drills will be rejected..
Find mean, median, mode, range, variance and standard deviation separately for every type of business - How well the model fits the data
Find the probability that the number that say they would feel secure is? (a) exactly? five, (b) more than? five, and? (c) at most five.
A bank employs two appraisers. When approving borrowers for mortgages, it is imperative that the appraisers value the same types of properties consistently.
Please calculate the 99% confidence interval for µ based on the information provided. Lower interval Upper interval
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