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From a random sample of 41 teens, it is found that on average they spend 31.8 hours each week online with a standard deviation of 3.65 hours. What is the 90% confidence interval for the amount of time they spend online e ...
In a health club, research shows that on average, patrons spend an average of 42.5 minutes on the treadmill, with a standard deviation of 4.8 minutes. It is assumed that this is a normally distributed variable. Find the ...
Why randomized control trial (RCT) generates a strong internal validity?
Briefly explain the meaning of the t-test for regression analysis. How can the "rule of two" be used to evaluate t-ratios?
Ernie's utility function is U ( x , y ) = 32 xy . He has 10 units of good x and 8 units of good y. Waldo's utility function for the same two goods is U ( x , y ) = 3 x + 5 y . Waldo has 9 units of x and 13 units o ...
A jewerly store paid a unit price of $250 less 40%, 16% , 8% for a shipment of designer watches. the store's overhead expenses are 65% of cost and the required profit is 55% of coat. a. What is the regular selling price ...
In the summer of 2013, Walt Disney released The Lone Ranger, starring Johnny Depp and produced by Jerry Bruckheimer. The film bombed at the box office: Worldwide, it earned about $245 million in revenue, well below the $ ...
The stock price for International Business Machines (IBM) historically has followed an approximately normal distribution (when adjusting for inflation) with a mean of $155.483 and standard deviation of $4.0278. What is t ...
Identify a recent merger/acquisition and use it to and explain: was the merger/acquisition predominately about gaining economies of scale or economies scope?
Each of the following lists has an average of 50. For which one is the spread of the numbers around the average biggest?smallest? a. 0, 20, 40, 50, 60, 80, 100 b. 0, 48, 49, 50, 51, 52, 100 c. 0, 1, 2, 50, 98, 99, 100 Gu ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As