The scores on a driver's test are normally distributed with a mean of 100. Find the score that is 3 standard deviations above the mean, if the standard deviation is 28. A. 128 В. 156 С. 103 O D. 184
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- Does room temperature affect cognitive function A psychologist randomly divides 60 volunteers into two groups. One group of 30 solves a erossword puzzle in a room kept at 72 °F, the other group of 30 solves the puzzle in arocm kept-at 85 °F The mean completion time (x1) for the subjects in the "cool" room is 20 minutes-and the standard deviation is s =6 minutes. The mean (x) for the subjects in the "warm" room is 26 minute and the standard deviation is s 8 minutes. Let h and th represent the mean completion times for all potențial volunteers similar to the ones in this study when they are in "cool" or "warm" reoms, respectively. Using technology, which of the following is a 99% confidence interval for th-u? a. (-15.09, 3.09) b. %3D (-10.88, -1.12) c. (-9.80,-1.57) d. (-9.56,-2.44) e. (-7.82,-4.18) Which of the following describes a situati on in which it is safe to employ t procedures? n=10, n2 = 40; both samples are moderately skewed. b. nį=10, n2 = 8; sample 1 is approximately…Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00°C. Assume 2.7% of the thermometers are rejected because they have readings that are too high and another 2.7% are rejected because they have readings that are too low. Draw a sketch and find the two readings that are cutoff values separating the rejected thermometers from the others. Click to view page 1 of the table. Click to view page 2 of the table. Which graph represents the region in which thermometers are rejected? Choose the correct graph below. В. D. The cutoff values are degrees. (Use a comma to separate answers as needed. Round to two decimal places as needed.)24
- Thank you in advance.The mean score on a driving exam for a group of driver's education students is 76 points, with a standard deviation of 5 points. Apply Chebychev's Theorem to the data using k = 2. Interpret the results. At least % of the exam scores fall between and. (Simplify your answers.)A data set has a mean of 40 and standard deviation of 8. -2 standard deviation = -1 standard deviation = +1 standard deviation = +2 standard deviation =
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