8.A 96% confidence interval for the proportion of the labor force that in unemployed in a certain city is(0.07, 0.10). Which of the following statements about this interval is true?a. The probability is 0.96 that between 7% and 10% of the labor force is unemployed.b. About 96% of the intervals constructed by this method will contain the true proportion ofunemployed in the city.In repeated samples of the same size, there is a 96% chance that the sample proportion will fallbetween 0.07 and 0.10.d. The true rate of unemployment lies within this interval 96% of the time.e. Between 7% and 10% of the labor force is unemployed 96% of the time.Normally distributed with a

Given The data is as follows: The 96% CI for the proportion of the unemployed labor force is (0.07,…

Answered: 8. A 96% confidence interval for the…

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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If n = 20, ¯xx¯ = 47, and s = 10, construct a confidence interval at a 80% confidence level. Assume the data came from a normally distributed population. Give your answers to three decimal places. ___________<μ<_____________
Example: Suppose the mean of the number of unproductive days for a certain large segment of the population in a given year is 5.4 and the standard deviation is 2.8 days. Find the probabilities that average number of unproductive days of a random sampling of 49 from this environment is: a. more than 6 days b. between 4 and 6 days.
QUESTION 26 Employees in a company experience distractions (phone calls, emails, unscheduled visits etc.) during their office hours. Given that the distraction times are right skewed with a mean of 95 minutes and a standard deviation of 18 minutes. What is the probability that for a random sample of 36 employees their mean distraction time is more than 100 minutes? 0.0004 0.0478 0.3906 0.9772
help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working
A researcher is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 97 students who averaged 25.5 texts per day. The standard deviation was 20.5 texts. Round answers to 3 decimal places where possible. b. With 90% confidence the population mean number of texts per day is between ______ and _______ texts. c. If many groups of 97 randomly selected members are studied, then a different confidence interval would be produced from each group. About _______ percent of these confidence intervals will contain the true population number of texts per day and about ___________ percent will not contain the true population mean number of texts per day.
18 O 16 O 20 42 QUESTION 9 The service time for customers coming through a checkout counter has mean 50 seconds and standard deviation 6.8 seconds. Find the probability that the average service time for 64 passengers to get service will be between 48.4 and 51.6 seconds. O 0.0301 O 0.1897 0.9699 O 0.9399 QUESTION 10 A research worker wants to determine the average time it takes a mechanic to rotate the tires of a car, and she wants to be able to assert with 95% confidence that the mean of her sample is off by at most 0.3 minutes. If she can presume from past experience that the actual time follows normal distribution with a standard deviation of 1.5 minutes, how large the sample will she have to take? O 96 97 9. Save All Answers Click Save and Submit to save and submit. Click Save All Answers to save all answers. O O O O
A population has a mean of 50 and a standard deviation of 19 If a random sample of 36 is taken, what is the probability that the sample mean is each of the following? a . Greater than 50. b. less than 52. C. less than 49. d.between 45.5 and 54.5 e and Between 50.5 and 51.1
A student was analyzing a data set that was Normally distributed with a mean of . She calculated the z-score of a score z in the data set and looked up this value on a z-table (the same z-tables we have been using in class). The table gave a value of 0.4918 in this instance. Which of the following statements is true. O Any score in this data set has a 49.18% chance of being between 2 and z. O The score has a probability of 49.18. O The standard deviation of this data set is 0.4918 O The score x is 0.4918 standard deviations away from the mean.
(5) You take a random sample from some population and form a 98% confidence interval for the population mean, a. Which quantity is guaranteed to be in the interval you form? A. 0 B. u C. D. 0.98
. Buck randomly selects 38 basketball shoes from the Shoe Warehouse and finds the mean prie to be $66.88 with a standard deviation of $5.62. Construct a 99% confidence interval for the population standard deviation o, and find the x2 values used in the calculation. A. ($4.31, $7.93) with xỉ = 18.586 and x = 62.833 B. ($4.27, $7.78) with xỉ = 19.286 and xỉ = 64.181 C. ($1.82, $3.34) with xỉ = 18.586 and x = 62.833 D. ($4.27, $7.78) with xỉ = 19.960 and xi = 59.893 E. ($18.58, $62.88) with xỉ = 18.586 and x = 62.833 %3D %3D reject
25. Given the following data for an imaginary superhero universe: Flying Telepathy Super Strength Female 27 99 39 Male 27 95 57 Distribution of Super Power by Gender What is the empirical probability that a randomly selected superhero will have super strength? Answer in decimal form. Round to 3 decimal places as
A production line in a factory, assembles laptops. A random sample of assembly time of 49 laptops has been drawn from this factory. Suppose, the population distribution has a mean assembly time of 30 minutes and standard deviation 7 minutes. What is the assembly time that 90% of sample means are less than that time? [ Select one: a. None of the others O b. 28.36 c. 31.28 d. 28.72 e. 31.64

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