Question 8 of 50ion 82 pointsSave AnswerA normally distributed population with 100 observations has a mean of 10 and unknown standard deviation. A sample of size 25with a sample standard deviation of 4 is randomly drawn from the population. Estimate the population standard deviation o using a95% confidence interval.O A. (1.56; 2.78)O B. (9.76; 30.96)OC (2.44; 7.74)O D. (3.12; 5.56)Question 8 of 50A Moving to the next question prevents changes to this answer.10:1423°C Sunny AD ENG2021/11/29homeendinsprt scdeletef10 111914440backspacelock9600II

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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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Scôre: 6.53/20 /720 ans wered • Question 5 A sample of size n = 10 is drawn from a population. The data is shown below. 126 111.2 101.4 126 105.6 92.6 90.7 106.6 85.2 126 What is the range of this data set? range = What is the standard deviation of this data set? (Remember, it is a sample.) Please report the answer with appropriate rounding, reporting 2 more decimal places than the original data. Please, please, please do not calculate the value by hand. stdev = Question Help: Message instructor I Calculator Submit Question
v Question Completion Status: d. 0.3085 QUESTION 2 EPA fuel economy estimates for automobile models tested recently predicts a mean of 24 and a standard deviation of 6 mpg. Assume that a Normal model applies, N(24, 6). mpg What proportion of automobiles would expect to have gas mileage rates between 10 and 16 mpg? O a. 0.1587 O b. 0.0819 C. 0.0099 O d. 0.0918 QUESTION 3
Assume that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for a sample of size 17 with a mean of 52.8 and a standard deviation of 20.3. Round your answers to two decimal places. ________< μμ < __________
Assume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u1. P2. H3 represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H. H Cost of batteries by type The claim is the V hypothesis. Group size 35 Group size 65 Group size 24/24F 101 111 121 124 D 146 173 182 278 124 140 141 89 (b) Find the critical value, Fo, and identify the rejection region. 90 79 84 The rejection region is F Fo, where Fo = (Round to two decimal places as needed.) (c) Find the test statistic F. Print Done F= (Round to two decimal places as…
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A population of values has an unknown distribution with μ=109.2μ=109.2 and σ=15.3σ=15.3. You intend to draw a random sample of size n=88n=88.What is the mean of the distribution of sample means?μ¯x=μx¯= ____________ (Please enter an exact answer.)What is the standard deviation of the distribution of sample means?σ¯x=σx¯=_____________ (Please report your answer accurate to 2 decimal places.)
Find the left and right chi square values, then give the confidence interval. Sample Variance s 15.99 %3D Confidence Level c = 0.90 and Sample Size n = 13 and x %3D %3D At the 90 % level of confidence the population variance is between and (Round all answers to 3 decimal places)
A pair of dice is rolled 210 times. What is the probability that a total of 7 occurs (a) at least 24 times? (b) between 38 and 48 times inclusive? (c) exactly 35 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.
Interstate Speeds It has been reported that the standard deviation of the speeds of drivers on Interstate 75 near Findlay, Ohio, is 8 miles per hour for all vehicles. A driver feels from experience that this is very low. A survey is conducted, and for 29 drivers the standard deviation is 9.1 miles per hour. At =α0.05, is the driver correct? Assume the variable is normally distributed. (a)State the hypotheses and identify the claim with the correct hypothesis.
Find the standard deviation a for the bionomal distribution which has the stated values of n and p.
Breaking Strength of Steel Cable The average breaking strength of a certain brand of steel cable is 2000pounds, with a standard deviation of 100pounds. A sample of 20 cables is selected and tested. Find the sample mean that will cut off the upper 91% of all samples of size 20 taken from the population. Assume the variable is normally distributed. Round intermediate z-value calculations to 2 decimal places and round the final answer to at least 2 decimal places. The sample mean that will cut off the upper 91% of all samples of size 20 is ____ pounds.

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