TRFETwo intervals are given, A and B. for the same value of the explanatory variable.A: 2.2 to 7.0; B: 2.1 to 7.1%3;(al Which interval is the confidence interval for the mean response?Which interval is the prediction interval for the response?(b) What is the predicted value of the response variable for this value of the explanatory variable?Enter the exact answer.The predicted value iseTextbook and MediaHintAttempts: 0 of 3 usSave for LaterType here to search" 立0PrtScn.Home4x F2F3F4F5F1#5.9.3.4.2.

The intervals are 2.2 to 7.0 and 2.1 to 7.1.

Answered: T R FE Two intervals are given, A and…

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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MARGIN OF ERROR 1. Given: n=130, a = 25, level of confidence is 90%. What is the margin of error of the given data?
Suppose a 90% confidence interval estimate mean is (25.2, 43.4). Now, using the same exact information, you compute a 95% confidence interval. Which of the following statements is correct? O The 95% confidence interval is longer. The answer can't be determined from the information given. The intervals have the same lengths The 95% confidence interval is shorter
H 2
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A second-grade teacher wants to compare scores on a reading assessment at the beginning of the year to scores on the same assessment at the end of the year. There are 28 in the class, and all students take both of the assessments. What is the degrees of freedom value for the paired-samples t test? a. 54 b. 55 c. 28 d. 27
Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores: Grades 69 69 63.9 68.4 62.7 73.5 73.5 64.3 Test grades are believed to be normally distributed. Use a significance level of 5%. A. State the alternative hypothesis: HA: Ομ 65 B. State the mean of the sample: C. State the standard error of the sample means: D. State the test statistic: t = E. State the p-value: F. Decision: O Fail to reject the null hypothesis. Reject the null hypothesis. 73.5 96
Statistics students believe that the mean soore on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores: Grades 96 69 83.2 69 65 85.5 74.4 65 85.5 66.5 Test grades are believed to be normally distributed. Use a significance level of 5%. A. State the alternative hypothesis: H: Ομ 65 B. State the mean of the sample: (Round to two decimal places.) C. State the standard error of the sample means: (Round to four decimal places.) D. State the test statistic: t = (Round to four decimal places.) E. State the D-value; (Round to four decimal places.) F. Decision: O Do not reject the null hypothesis. O Reject the null hypothesis. Submit Question
Auditors make assessments on the basis of their individual experience, the experience of others, or a combination of experiences. A study of the auditors’ methods was performed. The average number of errors is recorded. At a=0.10, test the claim that errors are equal. Individual Experience Experience of Others Combination 19.9 18.4 21.1 19.1 19.6 18.3 23.3 15.4 21.3 19.3 21.5 23.8 20.1 17.4 23.4 19.7 23.1 17.2 23.4 17.6 20.1 17.3 20.3 20.4 22.3 20.1 20.7 21.0 18.4 17.4 19.5 19.9 23.6 20.0 22.1 19.1 20.1 20.6 24.9 17.8 17.7 21.5 19.2 22.0 17.5 18.3 19.6 24.4 20.2 20.5 20.8 19.7 26.2 20.2 22.7 21.7
A survey was conducted two years ago asking college students their top motivations for using a credit card. You think this distribution has changed. You randomly select 425 college students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a change in the distribution? Use a =0.05. Complete parts (a) through (d). Response Old Survey % 27% 23% 22% New Survey Frequency, f O 112 Rewards Low rates Cash back Discounts Other 96 108 7% 47 21% 62 (b) Determine the cntical value, Xo, and the rejection region. X =(Round to three decimal places as needed.) Choose the correct rejection region below. O B. X>x OD. X
Write your answer in the p +- e notation. A study found that out of 39,700 drivers that went through a traffic intersection, 794 ran a red light. Construct a 90% confidence interval to estimate the proportion of people who ran the light. We will use estimation using confidence intervals. This time we will be using estimation of proportion. x ____________ n ____________ p hat ___________ C-level ___________
%3D Elsie made a one-sample z interval for a proportion and used the critical value z* = 1.405. What confidence level did she use? Choose 1 answer: A 84% B 86% 88% D. 92%
98% (lype an integer or a decimal.) d. Il the claim in part (c) is tested using this sample data, we get this confidence interval: -0.000620

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