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An analyst thinks that the economic conditions during the next year will either be Strong, Normal or Weak and she thinks that the Simpson Company's returns will have the following probability distribution. What's the standard deviation of Simpson's returns as estimated by this analyst?
PROBABILITY RETURN
A spool of thin wire (with inner radius r = 0.50 m, outer radius R = 0.65 m, and moment of inertia I_cm = 1.1323 kg*m2) pivots on a shaft.
A random sample of 7 students selected from a large class revealed the following scores: midterm 70, 62, 57, 68, 89, 63, 82 and on the final 80, 79, 87, 88, 85, 79, 91. Is there evidence of an improvement on the final?
A 14 g ball of clay travelling east at 3.0 m/s collides with a 30 g ball of clay travelling north at 2.00m/s. What are the speed and the direction of resulting 44 g ball of clay.
A manufacturing process produces items whose weights are basically distributed. It is known that 22.57% of all the items produced, weigh between 100 grams up to the mean and 49.18% weigh from the mean up to 190 grams.
Explain the problems of homelessness based upon the developmental, situational, and human needs perspectives
A player bounces a 0.47 kg soccer ball off her head, changing the velocity of the ball from i = (9.2 m/s) + (-2.7 m/s) to f = (6.1 m/s) + (5.5 m/s). The ball is in contact with the player's head for 6.70ms.
Critically discuss the reasons for studying statistics? Choose five random numbers between 70-100. Calculate the mean, and midrange of these numbers.
A 100-m-long train accelerates uniformly from rest. If the front of the train passes a railway worker 166-m down the track at a speed of 21 m/s, what will be the speed of the last car as it passes the worker.
Sociologists sometimes talk about U-shaped curve of marital satisfaction. Assume, married couples are happiest before they have children and after their children have grown up and left home. Do you agree with this result.
What purpose do they serve under a performance management system? Performance appraisals are they necessary or not?
Form the column of differences and find the mean and standard deviation of this column of numbers.
Utilizing the 5% level of significance as there was a significant change in cholesterol level. Their total cholesterol levels before also after the diet.
The sample mean of the accounts is found to be y-bar = $94.22, and the sample variance is equal to $455.21. Estimate mu and place a bound on the error of estimation.
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
A health care analyst would like to know that if the duration of a given eye surgical procedure has a normal distribution with a mean of 240 minutes and a standard deviation of 40 minutes
Compute the coefficient of determination for bone loss and women's age and describe what this statistic means.
A haulage contractor has two loads to deliver to separate customers. He has 4 trailers of which 2 are new. If the trailers are randomly chosen for any particular delivery: (a) In how many ways can the trailers be allocated the deliveries?
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
An experiment is designed using three levels of ground clutter and two filter types. The experiment is performed by randomly selecting a treatment combination
It is believed that population standard deviation is 15 days. If test is conducted using a 0.05 level of significance, what conclusion must be reached?
The data was used to make inferences regarding the other students taking the course. Construct a 95% confidence interval estimate. Explain your findings so that your non-quantitative partner will understand them. Their data is below:
A random sample of 400 observations produced a sample proportion of 0.32. What is the standard error to construct a 99.5% confidence interval.
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