S14$15S16S17S18S19S2069.0H81.0 69.0H81.0(a) How many of the 75% confidence intervals constructed from the 20 samples contain the population mean, u = 75?(b) How many of the 95% confidence intervals constructed from the 20 samples contain the population mean, μ = 75?(c) Choose ALL that are true.It is not surprising that some 75% confidence intervals are different from other 75% confidence intervals. Eachconfidence interval depends on its sample, and different samples may give different confidence intervals.The center of the 75% confidence interval for Sample 1 is 75, because the center of any confidence interval for thepopulation mean must be the population mean.All of the 95% confidence intervals should be the same as each other. Since they are not all the same, there musthave been errors due to rounding.We would expect to find more 75% confidence intervals that contain the population mean than 95% confidenceX Suppose we are interested in studying a population to estimate its mean. The population is normal and has a standard deviation of o=10. We have taken arandom sample of size n = 42 from the population. This is Sample 1 in the table below. (In the table, Sample 1 is written "S1", Sample 2 is written "S2", etc.) Asshown in the table, the sample mean of Sample 1 is x = 74.5. Also shown are the lower and upper limits of the 75% confidence interval for the population meanusing this sample, as well as the lower and upper limits of the 95% confidence interval. Suppose that the true mean of the population is u=75, which is shownon the displays for the confidence intervals.Press the "Generate Samples" button to simulate taking 19 more random samples of size n=42 from this same population. (The 75% and 95% confidenceintervals for all of the samples are shown in the table and graphed.) Then complete parts (a) through (c) below the table.75% 75% 95% 95%lower upper lower upperlimit limit limit limitS1 74.5 72.7 76.3 71.5 77.5S2S3S4S5S6S7S8S9S10S11S12S13xGenerate Samples75% confidence intervals95% confidence intervals

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Answered: Suppose we are interested in studying a…

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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Question three John and his friend were recently having a heated discussion about the number of men living in a western parish who possibly cared for children that are not biologically theirs during 2020. Assume that a survey of the parish's population revealed that the average number of cases and the standard deviation was 5,000 and 6000 in 2019, respectively. John and his friend do not believe that the population average is correct. Assume that a survey based on a sample of the 800 people was conducted and found that the average number of cases in the western parish was 10,000 over the 12 months period. Conduct a hypothesis test, using a 5% significance level to determine if the average number of cases is actually higher based on the sample data.
Question three John and his friend were recently having a heated discussion about the number of men living in a western parish who possibly cared for children that are not biologically theirs during 2019. Assume that a survey of the parish’s population revealed that the average number of cases and the standard deviation was 5,000 and 6000 in 2019, respectively. John and his friend do not believe that the population average is correct. Assume that a survey based on a sample of the 800 people was conducted and found that the average number of cases in the western parish was 10,000 over the 12 months period. Conduct a hypothesis test, using a 5% significance level to determine if the average number of cases is actually higher based on the sample data.
Question 3 Subparts d, f , h, i Thank you
QUESTION 6 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 9596 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 6. 68
QUESTION 7 You are interested in seeing whether emotions impact decision making. You have three groups--a happy group, a sad group, and a neutral group. For the happy group there are 5 participants and the mean risky decision making score 5.0 with a standard deviation of 0.7. For the sad group there are 5 participants and the mean risky decision making score 5.4 with a standard deviation of 1.1. For the neutral group there are 5 participants and the mean risky decision making score 5.8 with a standard deviation of 2.8. The sum of squares between samples is equal to 1.6. The sum of squares within samples is equal to 38.0. What is the degrees of freedom within samples? Please do the calculations on the handout provided.
QUESTION 9 The length of an adult Great White Shark is normally distributed with a mean of 3.4 meters and a standard deviation of 0.5 meters. What is the probability that a randomly selected adult Great White is more than 4.7 meters long? Click Save and Submit to save and submit. Click Save All Answers to save all answers.
Question 7 Use the following information to answer Question 7 and Question 8.The marks of six students in a Mathematics test are represented by the variable x. The following data was produced: n=6, Σx = 279 and Σx2= 13 093.Find the mean and standard deviation of the following data.A. mean =46.5 , standard deviation = 5.82B. mean = 52.5, standard deviation = 4.89C. mean =46.5 , standard deviation = 4.89D. mean =52.5 , standard deviation = 5.82 Question 8 It was later discovered that one of the values was incorrectly recorded as 43. The correct value, in fact, is 34. Find the new values of the mean and standard deviation.A. mean = 45 , standard deviation = 7.07B. mean = 51, standard deviation = 6.84C. mean = 45 , standard deviation = 6.84D. mean = 51 , standard deviation = 7.07
QUESTION 20 The time spent on social media platforms per day by adults has a distribution with a mean of 125 minutes and a standard deviation of 16 minutes. A random sample of size 16 adults is selected from the population. Find the mean and standard error of the sample mean time spent on social media platforms per day.
Question 15: you are considering taking two professors for a statistics course. both professors have an average of 65%. The first professor has a Standard deviation of 1%. The second professor has a standard deviation of 15%. Which professor do you have a better chance of passing with?
Question 4 The length of a fully grown hibiscus plant is normally distributed and has a mean 35cm. It is found that 5% of these plants are longer than 45cm. Find the standard deviation σ. When plants are chosen for sale, those shorter than 30cm are rejected. Find the probability that a plant will be rejected. Please show the solution using standard normal table
QUESTION 20 The time spent on social media platforms per day by adults has a distribution with a mean of 125 minutes and a standard deviation of 16 minutes. A random sample of size 16 adults is selected from the population. Find the mean and standard error of the sample mean time spent on social media platforms per day.
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