Use the following information to complete steps (a) through (d) below. A random sample of size n, = 31 results in a sample mean of 125.3 and a sample standard deviation of 8.5. An independent sample of size n, = 50 results in a sample mean of 131.8 and sample standard deviation of 7.3. Does this constitute sufficient evidence to conclude that the population means differ at the ¤ = 0.05 level of significance? O A. A hypothesis test regarding the difference of two means using a matched-pairs design. O B. Ahypothesis test regarding the difference between two population proportions from independent samples. O C. A hypothesis test regarding two population standard deviations. OD. A hypothesis test regarding the difference of two means using Welch's approximate t. (b) Determine the null and alternative hypotheses. Choose the correct answer below. O A. Ho: H1 = HHq>H2 O B. Ho: H1 SH2HH1# H2 c. Họ: H1 =H2; Hq:H1 # H2 O D. Ho: H1 = 2; Hq: µ1 SH2 (c) Use technology to calculate the P-value. (Round to three decimal places as needed.)

Use the following information to complete steps (a) through (d) below. A random sample of size n, = 31 results in a sample mean of 125.3 and a sample standard deviation of 8.5. An independent sample of size n, = 50 results in a sample mean of 131.8 and sample standard deviation of 7.3. Does this constitute sufficient evidence to conclude that the population means differ at the ¤ = 0.05 level of significance? O A. A hypothesis test regarding the difference of two means using a matched-pairs design. O B. Ahypothesis test regarding the difference between two population proportions from independent samples. O C. A hypothesis test regarding two population standard deviations. OD. A hypothesis test regarding the difference of two means using Welch's approximate t. (b) Determine the null and alternative hypotheses. Choose the correct answer below. O A. Ho: H1 = HHq>H2 O B. Ho: H1 SH2HH1# H2 c. Họ: H1 =H2; Hq:H1 # H2 O D. Ho: H1 = 2; Hq: µ1 SH2 (c) Use technology to calculate the P-value. (Round to three decimal places as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Exam 1 scores have a mean of 500and a standard deviation of 110, while exam 2 scores have a mean of 20 and a standard deviation of 3. Assuming both types of scores have distributions that are unimodal and symmetric, which is more unusual: an exam 1 score of 790 or an exam 2 score of 28? A. The exam 2 score is more unusual. B. The exam 1 score is more unusual. C. They are the same. D. It cannot be determined which exam score is more unusual
The mileage in miles per gallon of several cars when they were new and when they were 3 years old is listed below. New 27 17 33 28 24 18 22 20 29 3 years 24 15 29 25 22 16 20 18 26 The mean of the sample of new car mileages is x = 23.9 with a sample standard deviation of sx 5.2, and The mean of the sample of three year old car mileage is ỹ = 21.4 with a sample standard deviation of sy = 4.6. The linear correlation coefficient is r = 0.998, which suggests linear correlation. Find the regression line and use it to predict the mileage a car will have after 3 years, if it gets 26 miles per gallon when it is new.
C AND D ONLY
Q.28 only
A population has a mean µ = 87 and a standard deviation à = 23. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 257. ox = (Simplify your answer.) (Type an integer or decimal rounded to three decimal places as needed.) 33
Consider the following data for two independent random samples taken from two normal populations. Excel File: data10-11.xlsx Sample 1 10 7 13 7 9 8 Sample 2 8 7 8 4 6 9 a. Compute the two sample means. (to nearest whole number) 9. 7 b. Compute the two sample standard deviations. (to 2 decimals) S1 = 2.28 O 82 = 1.79 O c. What is the point estimate of the difference between the two population means? 2 d. What is the 90% confidence interval estimate of the difference between the two population means? (to 2 decimals and enter negative value as negative number) .05 3.95
Is the difference between the mean annual salaries of entry level architects in Denver, Colorado, and Lincoln, Nebraska, equal to $10,500? To decide, you select a random sample of entry level architects from each city. The results of each survey are shown. Assume the population standard deviations are o₁ =$6511 and 2 = $6192. At a = 0.01, what should you conclude? Entry level architects Entry level architects in Denver, CO x₁ = 58,300 n₁ = 39 In Lincoln, NE x2 = 54,240 n2 = 30 What are the null and alternative hypotheses for this test? OA. Ho: H₁₂ = 10,500 Ha: H₁-H2*10,500 OD. Ho: P₁-H2>10,500 Ha: H1-H₂s 10,500 Calculate the standardized test statistic. z= (Round to two decimal places as needed.) Determine the P-value. The P-value is (Round to three decimal places as needed.) What can you conclude about the data? OB. Ho: H1 H2S 10,500 Ha H1-H2>10,500 OC. Ho: H1 H2210,500 Ha H1-H2 <10,500 OE. Ho: H1 H2*10,500 Ha: 1-2=10,500 OA. Reject Ho. At the 1% level of significance, there is…
A Moving to another question will save this response. Question 1 Consider a sample with a mean of 30 and a standard deviation of 2.5. Use Chebyshev's theorem to determine the percentage of the data within the ranges from 23 to 37. O a. 61% O b. 75% O c. 87% Od. 83%