The weight of plastic pellets for an injection molding process is a characteristic of interest. A random sample of 15 pellets is selected and gives the following weights in grams) 22770 17 19 22 21 222 2222 17 19 18 18 2220 21 222 20 21 ssuming the distribution of the weight of pellets to be normal, find a two-sided 95% atistical tolerance limits that contain 90% of the population.

Suppose that a customer is purchasing a car. He conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. He conducts this experiment 15 times on each car and records the number of miles driven. 1.) Describe each data​ set, that is determine the​ shape, center, and spread.   Sample mean for Car 1 x=enter your response here mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Sample mean for Car 2 x=enter your response here mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Median for Car 1 M=enter your response here mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Median for Car 2 M=enter your response here mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Range for Car 1 R=enter your response here mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Range for…

A test was conducted of two overnight mail delivery services. Two samples of identical deliveries were set up so that both delivery services were notified of the need for a delivery at the same time. The hours required to make each delivery follow. Do the data shown suggest a difference in the delivery times for the two services? Use a .05 le of significance for the test. Use Table 1 of Appendix B. Click on the datafile logo to reference the data. DATA file Service Delivery 1 2 24.5 26.0 28.0 21.0 18.0 36.0 25.0 21.0 24.0 26.0 31.0 28.0 25.5 32.0 20.0 19.5 28.0 29.0 22.0 23.5 29.5 30.0 3 4 6. 9. 10 11 What is the z-statistic? If required, round your answer to two decimal places. Enter negative values as negative number, if necessary. .30 What is the p-value? If required, round your answer to two decimal places. .7642 Conclude:

The contents of 10 similar containers of a commercial soap are 10.2, 9.7, 10.1, 10.3, 10.1, 9.8, 9.9, 10.4, 10.3 and 9.8 liters. Assume that the soap content measurements follow an approximate normal distribution.   What is the margin of error using a 95% level of confidence?

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To estimate the mean amount of paint in all 1-gal cans with 95% confidence to within .004 gals, what sample size is required?

Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Use a 0.05 significance level to test for a difference between the measurements from the two arms. Identify the test statistic and p-value. Right arm Left arm 147 170 131 127 139 166 192 O A. T = -4.01, p-value = 0.016 OB. T = -2.32, p-value = 0.081 O C. T = -3.07, p-value = 0.037 139 136 139 D.T=-1.93, p-value = 0.127 S