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Consider the trash bag problem. Suppose that an independent laboratory has tested trash bags and has found that no 30-gallon bags that are currently on the market have a mean breaking strength of 50 pounds or more. On the basis of these results, the producer of the new, improved trash bag feels sure that its 30-gallon bag will be the strongest such bag on the market if the new trash bag's breaking strength can be shown to be at least 50 pounds. The mean and the standard deviation of the sample of 40 trash bag breaking strengths are X (sample mean) = 50.575 and s = 1.6438. If we let m denote the mean of the breaking strengths of all possible trash bags of the new type,
a. Calculate 95 percent and 99 percent confidence intervals for m.b. Using the 95 percent confidence interval, can we be 95 confident that m is at least 50 pounds? Explain.c. Using the 99 percent confidence interval, can we be 99 confident that m is at least 50 pounds? Explain.d. Based on your answers to parts b and c, how confident are you that the new 30-gallon trash bag is the strongest on the market.
Complete the exercise from the data given and answer all of the questions in a written summary. Cut and paste any EXCEL data that you wish to discuss.
What should the mean and standard deviation be if these were uniformly distributed random integers? Need to find Mean and Standard Deviation?
A local grocery store wants to estimate the mean daily number of gallons of milk sold to customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 5.10 gallons.
$600 (1 chance in 4800); $200 (1 chance in 2500). Find the expected value of the amount won for one entry if the cost of entering is 52 cents.
Explain finding value of test statistic and P-value also understand the result. At the .01 significance level can we compute that the mean fare has increased.
The Web-based company Oh Baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received. If 485 out of the next 500 orders are processed on the same day
The process of using sample statistics to draw conclusion about the true population parameters is called:
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There are twelve months. Given the cohort of 100 which starts the program, about how many are left after twelve months?
Create the estimated regression equation by calculating the values of b 0 and b 1
Company have MBA degrees. Also, 64 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
Compute the test statistic for the goodness of fit test. At 95% confidence using the p-value approach, test the hypotheses. What do you conclude about the distribution?
An independent-measures research study was used to compare two treatment conditions with n = 4 participants in each treatment. The first treatment had a mean of M = 58 with a variance of s^2 = 28, and the second treatment had M = 52 with s^2 = 36.
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