An engineer wishes to determine the width of a particular electronic component. If she knows that the standard deviation is 3.5 mm, how many of these components should she consider to be 99% sure of knowing the mean will be within ±0.1±0.1 mm? 35 8128 6630 91 99565

A variable is normally distributed with a mean of 17 and a standard deviation of 8. Use your graphing calculator to find each of the following areas. Write your answers in decimal form. Round to the nearest thousandth as needed.a) Find the area to the left of 20. b) Find the area to the left of 11. c) Find the area to the right of 14. d) Find the area to the right of 21. e) Find the area between 11 and 26

Identify the notation for each given number. For a random sample of 550 randomly selected car batteries, it was found that their output had a mean of 12.5 volts and a standard deviation of 1.2 volts. V = 550 car batteries V = 12.5 volts V = 1.2 volts

For a population with a population mean = 60 and a standard deviation = 9, find the z-score for each of the following X values. A. X = 75 B. X = 53

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If the standard deviation of a data set was originally 5, and if each value in the data set was multiplied by 4.8, what would be the standard deviation of the resulting data? O A. 14 OB. 5 OC. 19 O D. 24

Use the information below to answer Questions #28 and #29. A population has a mean u = 86 and a standard deviation o = 6. Find the population mean of the sample means (HE) with sample size n = 36. Simplify your answer.

Identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. If sample data consist of weights measured in grams, what units are used for these statistics and parameter a. The symbol for sample standard deviation is b. The symbol for population standard deviation is c. The symbol for sample variance is d. The symbol for population variance is If sample data consist of weights measured in grams, then correctly complete the following sentences. a. The unit for sample standard deviation would be b. The unit for population standard deviation would be C. The unit for sample variance would be ▼ d. The unit for population variance would be ▼ C

Suppose that the average reading speed of students completing a speed-reading course is 500 words per minute (wpm). If the standard deviation is 70 wpm, find the z score associated with each of the following reading speeds. (Round the answers to two decimal places.) 350 wpm 515 wpm 440 wpm 620 wpm

Solve the following problem without using excelThat is, solve step by stepCalculate the mean median mode and standard deviation of the data 21,30, 27, 30, 25