The height of women ages 20-29 is normally distributed, with a mean of 64.2 inches.Assume o = 2.6 inches. Are you more likely to randomly select 1 woman with a heightless than 66 inches or are you more likely to select a sample of 19 women with amean height less than 66 inches? Explain.Click the icon to view page 1 of the standard normal table.Click the icon to view page 2 of the standard normal table.What is the probability of randomly selecting 1 woman with a height less than 66inches?(Round to four decimal places as needed.)

a) The required probability is 0.7556Explanation:from the given data : mean (mu)=64.2standard…

Answered: The height of women ages 20-29 is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A binomial experiment is given. Decide whether you can use the normal distribution to approximate the binomial distribution. If you can, find the mean and standard deviation. If you cannot, explain why. A survey found that 85% of parents of teenagers have taken their teenager's cell phone or Internet privileges away as a punishment. You randomly select 14 parents of teenagers and ask them whether they have taken their teenager's cell phone or Internet privileges away as a punishment. Select the correct answer below and, if necessary, fill in the answer boxes to complete your choice. O A. Yes, the mean is and the standard deviation is. (Round to two decimal places as needed.) O B. No, because np < 5. O C. No, because nq < 5.
A quality control expert at a large factory estimates that 10% of all the batteries produced at the factory are defective. He takes a random sample of 15 of the batteries. A.What is the mean and standard deviation of the distribution?D.What is the probability that at least 2 of the 15 batteries selected are defective?
Mrs. Starnes enjoys doing Sudoku puzzles. The time she takes to complete an easy puzzle can be modeled by a Normal distribution with mean 5.3 minutes and standard deviation 0.9 minute. What proportion of the time does Mrs. Starnes finish an easy Sudoku puzzle in less than 3 minutes?
Traditionally, about 70% of students in a particular statistics course at ECC are successful. Suppose 20 students are selected at random from all previous students in this course. a. What are the mean and standard deviation of the number of students in a particular statistics course at ECC? b. What is the probability that more than 15 of them will have been successful in the course given that more than 10 of them will have been successful?
Ten engineering schools in a country were surveyed. The sample contained 275 electrical engineers, 80 being women; 200 chemical engineers, 30 being women. Compute a 99% confidence interval for the difference between the proportions of women in these two fields of engineering. Is there a significant difference between the two proportions? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. ..... Let p, be the population proportion of electrical engineers that are women in the schools that were surveyed and let p, be the population proportion of chemical engineers that are women in the schools that were surveyed. The 99% confidence interval is |
A pair of dice is rolled 150 times. What is the probability that a total of 7 occurs (a) at least 20 times? (b) between 29 and 39 times inclusive? (c) exactly 25 times? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. .....
CNNBC recently reported that the mean annual cost of auto insurance is 1050 dollars. Assume the standard deviation is 219 dollars, and the cost is normally distributed. You take a simple random sample of 8 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N 1050 b. What is the distribution of a? - N 1050 c. What is the probability that one randomly selected auto insurance is less than $996? 0.4013 d. a simple random sample of 8 auto insurance policies, find the probability that the average cost is less than $996. e. For part d), is the assumption of normal necessary? Yes No > Next Question 219 77.42
The average house has 11 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 14 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 12, 13, 12, 12, 12, 11, 13, 12, 13, 11, 10, 12, 11, 13 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer H1: Select an answer c. The test statistic ? ▼ (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is (? v f. Based on this, we should | Select an answer the null hypothesis. g. Thus, the final conclusion is that ... The data suggest the population mean is not significantly more than 11 at a = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers' houses…
Heights of 10-year-old, regardless of sex, closely follow a normal distribution with mean 55 inches and standard deviation 6 inches. A. What is the probability that a randomly chosen 10-year-old is shorter than 48 inches? B. What is the probability that a randomly chosen 10-year-old is between 60 and 65 inches?
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A study of the time spent shopping in a supermarket for 20 specific items showed an approximately uniform distribution between 20 minutes and 30 minutes. a. What is the probability that the shopping time will be between 24 and 27 minutes? b. What is the probability that the shopping time will be less than 26 minutes? c. What are the mean and standard deviation of the shopping time?

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