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A student takes a calculus midterm and a history midterm. The mean and standard deviation on the calculus midterm are 51 and 17 points while they are 70 and 31 on the history midterm. Suppose she gets 74 on the calculus midterm and 72 in history.
What score in history is comparable to her calculus score?
What score in calculus is comparable to her history score?
In which course is she doing better? Enter 1 for calculus, 2 for history.
Calculate each project's expected return, variance, and standard deviation. Rank the projects on the basis of (1) expected return and (2) risk. Which project would you choose?
an experiment was conducted to compare the weights of the combs of roosters fed two different vitamin-supplemented
A researcher wishes to test the claim that the average age of lifeguards in Ocean City is greater than 24 years. She selects a sample of 36 guards and finds the mean of the sample to be 24.7 years with a standard deviation of 2 years. Is there evi..
A population with u=73 and o=9 is transformed into a new population with u=10 and o=2. What is the new value for each of the following scores in the population?
Compute 95 percent confidence interval for mean percentage share of billing volume from network television for population of all US advertising agencies.
the editor of a textbook company is trying to decide whether to publish a proposed business statistics textbook.
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
standard deviation of the heights of young men is about 2.8 inches. suppose (unknown to you) the mean height of all male students is 70 inches. you measure 25 students. what is the sampling distribution of their average height x bar?
Determine the probability that a single light bulb lasts over 120 hours. (d) Could you use the CLT to approximate the distribution of the total lifetime of these bulbs?
The County Executive for Monroe County is concerned about the response time for the three fire companies in the county. Samples of the response times (in minutes) for each company follow. At the 0.05 significance level is there a difference in the me..
1. what is sampling? briefly explain the various methods of sampling.2. a company appoints four salesmen a b c and d
If an overrun contract was bid at 12 million dollars, what does the least-squares line predict for the cost of overrun (as a percent of bid price)?
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