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A population has a standard deviation of 50. a random sample items from this population is selected. the sample is determined to be 600. at 85% confidence, the margin of error is ??
Statistics and Probability, Statistics
The equation used to predict how long a cold will last is y=-1.8 + 0.09x1 + 3.2x2 - 1.9x3, where x1 is person's temperature on the first day, x2 is number of people seen each day, and x3 is the amount of sleep the person ...
During a certain week the mean price of gasoline was $2.719 a gallon. A ronadom sample of 32 stations is drwn. What is the probability that the mean price was between $2.695 and $2.716. Assume o=$0.048.
1. What is the standard deviation of the sampling distribution? 2. What is the expected value? 3. What is the probability that the average life in the sample will be between 2,670.56 and 2,809.76 hours? 4. What is the pr ...
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 ...
The company's cleaning service states that they spend more than 46 minutes each time the cleaning service is there. The company times the length of 37 randomly selected cleaning visits and finds the average is 47.6 minut ...
You have a bag with three fair dice. One is 4-sided, one is 6-sided, and one is 12-sided. You reach into the bag, pick one die at random, and roll it. The outcome of the roll is 4. What is the probability that you rolled ...
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round intermediate calculations. Round your answer to 2 decimal places.)
For each scenario below, what is the appropriate statistical analysis to use? (t-test for two independent samples, t-test for dependent samples, ANOVA, or chi-square test of independence) and why? (a) A study was conduct ...
A company recently had 26 million shares outstanding trading at $45/share. The company announces its intention to raise $290M by selling new shares. What percentage of the value of the company's existing equity prior to ...
in a survey of 3175 adults,1487 say they have paid their bills online in the last year. construct a 99% confidence interval for the population proportion.
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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