Question *A certain machine makes electrical resistors having a mean resistance of 3.2 ohms and astandard deviation of 1.6 ohms. The probability that a random sample of 64 of theseresistors will have a mean resistance of more than K ohms equal to 0.0228. Then thevalue of K is equal to:None of these3.33.63.5

At first the sample size is given 64 , so this is a Large Sample case and we can assume Central…

Answered: Question * A certain machine makes…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The fresh egg weight of a randomly selected egg of a Gadwall Duck is a random variable with a mean of 43.1 grams and standard deviation of 1.9 grams. Suppose 599 fresh Gadwall Duck eggs are randomly selected and weighed. Compute the probability that the mean of the 599 egg weights is within 0.1 grams of the mean. The fresh egg weight of a randomly selected egg of a Gadwall Duck is a random variable with a mean of 43.1 grams and standard deviation of 1.9 grams. Suppose 599 fresh Gadwall Duck eggs are randomly selected and weighed. Compute the probability that the mean of the 599 egg weights is within 0.1 grams of the mean.
Suppose that samples of size n = 25 are selected at random from a normal population with mean 100 and standard deviation 10. What is the probability that the sample mean falls in the interval from ug – 2.00g to ug + 1.2og ? Express your answer to four decimal places (e.g. 0.9876). The probability is i Statistical Tables and Char eTextbook and Media
Ch6. "A carpet manufacturing company is comparing the tensile strengths of two different types of synthetic fiber. Synthetic fiber A used in manufacturing carpet has tensile strength that is normally distributed with mean 75 psi and standard deviation 8 psi, and synthetic fiber B has tensile strength that is 75 psi and standard deviation 12 psi. Random sample of nA = 16 and nB = 9 of fiber specimens are selected. Find the probability that the sample mean of fiber specimen A exceeds the sample mean of fiber specimen B by 4."
population has a mean of 200 and a standard deviation of 50. Suppose a simple random sample of size 100 is selected and is used to estimate u. a. What is the probability that the sample mean will be within 25 of the population mean? b. What is the probability that the sample mean will be within@10 of the population mean? L(Ctrl) -
In the study of fingerprints, an important quantitative characteristic is the total ridge count for the ten fingers of an individual. Suppose that the total ridge counts of individuals in a certain population are approximately normally distributed with a mean of 140 and a standard deviation of 50. Find the probability that an individual picked at random from this population will have a ridge count of: (Explain your answer in each bullet) 200 or more Less than 100 Between 100 and 200 Between 200 and 250 In a population of 10,000 people, how many would you expect to have a ridge count of 200 or more?
In 2000, the average height of a woman aged 20-74 years was 64 inches with an increase of approximately 1 inch from 1960. Suppose the height of a woman is normally distributed with a standard deviation of two inches. • What is the probability that a randomly selected woman in this population is between 64 inches and 70 inches? • What is the probability that one woman selected at random from this population all exceed 70 inches? O a. NONE Ob.0.9973, 6.0042 x 10-9 Oc 0.0973, 0.0228 Od.0.4987, 0.0013
Ch6. "A carpet manufacturing company is comparing the tensile strengths of two different types of synthetic fiber. Synthetic fiber A used in manufacturing carpet has tensile strength that is normally distributed with mean 75 psi and standard deviation 12 psi, and synthetic fiber B has tensile strength that is 70 psi and standard deviation 12 psi. Random sample of nA = 16 and nB = 9 of fiber specimens are selected. Find the probability that the sample mean of fiber specimen A exceeds the sample mean of fiber specimen B by 4."
27-find standard deviation
A statistician wishing to test a hypothesis that students score at most 75% on the final exam in an introductory statistics course decides to randomly select 20 students in the class and have them take the exam early. The average score of the 20 students on the exam is 72% and the standard deviation in the population is known to be = 15%. The statistician calculates the test statistic to be –0.8944. If the statistician chose to do a two-sided alternative, the P-value would be calculated by: a. finding the area to the right of –0.8944 and doubling it. b. finding the area to the left of –0.8944 and doubling it. c. finding the area to the right of the absolute value of –0.8944 and dividing it by two. d. finding the area to the left of –0.8944
A dishwasher has a mean lifetime of 12 years with an estimated standard deviation of 1.25 years. The lifetime of a dishwasher is normally distributed. Suppose you are a manufacturer and you take a sample of 15 dishwashers that you made. Find probability that the sample mean lifetime of the 15 randomly selected dishwashers is less than 12.6 (4 decimals) find the probability that the sample mean lifetime of the 15 randomly selected dishwashers is less than 11.4 years thank u for the help

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