(e) Find an 80% confidence interval for y when x = 29 meters. (Round your answers to two decimal places.) lower limit hr upper limit hr (f) Use a 1% level of significance to test the claim that β < 0. (Round your answers to two decimal places.) t = critical t = (g) Find a 90% confidence interval for β and interpret its meaning. (Round your answers to three decimal places.) lower limit upper limit

(e) Find an 80% confidence interval for y when x = 29 meters. (Round your answers to two decimal places.) lower limit hr upper limit hr (f) Use a 1% level of significance to test the claim that β < 0. (Round your answers to two decimal places.) t = critical t = (g) Find a 90% confidence interval for β and interpret its meaning. (Round your answers to three decimal places.) lower limit upper limit

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 9PPS

See similar textbooks

Similar questions

A researcher developed a regression model to predict the cost of a meal based on the summated rating (sum of ratings for food, decor,and service) and the cost per meal for 12 restaurants. The results of the study show that b1=1.4379 and Sb1=0.1397. a. At the 0.05 level of significance, is there evidence of a linear relationship between the summated rating of a restaurant and the cost of a meal? b. Construct a 95% confidence interval estimate of the population slope, β1. a. Determine the hypotheses for the test. Choose the correct answer below. A. H0: β1=0 H1: β1≠0 B. H0: β0≤0 H1: β0>0 C. H0: β1≤0 H1: β1>0 D. H0: β0≥0 H1: β0<0 E. H0: β1≥0 H1: β1<0 F. H0: β0=0 H1: β0≠0 Compute the test statistic. The test statistic is ? (Round to two decimal places as needed.) Determine the critical value(s). The critical value(s) is(are) ? (Use a comma to separate answers as needed.…
You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of n=18,you determine that b1=4.6 and Sb1=1.9. c. Based on your answers to (a) and (b), what statistical decision should you make? d. Construct a 95% confidence interval estimate of the population slope, β1.
2. Below you are given a partial computer output based on a sample of 25 days of the price of a company's stock (Y in OMR), the Dow Jones industrial average (X 1 ) , and the stock price of the company's major competitor (X 2 in OMR). The 95% confidence interval for beta 2 is A. (- 1.0920, - 0.3080) B. (0.0095, 0.0505) C. (0.0104 , 0.0496 ) D. (- 1.1148, - 0.2852) E.None
Find the critical value Zc necessary to form a confidence interval at the level of confidence shown below. c=0.80
Find the critical value t/α2 needed to construct a confidence interval of the given level with the given sample size. Round the answers to three decimal places. a) For level 95% and sample size 7 b) For level 98% and sample size 12 c) For level 99% and sample size 27 d) For level 98% and sample size 14
Suppose we are making predictions of the dependent variable y for specific values of the independent variable x using a simple linear regression model holding the confidence level constant. Let Width (C.I) = the width of the confidence interval for the average value y for a given value of x, and Width (P.I) = the width of the prediction interval for a single value y for a given value of x. Which of the following statements is true? Width (C.I) = 0.5 Width (P.I) Width (C.I) = Width (P.I) Width (C.I) > Width (P.I) Width (C.I) < Width (P.I)
(f) Suppose you and your business associates rent a store, get a bank loan to start up your business, and do a little research on the size of your sales district and the number of competing stores in the district. If x2 = 2.8, x3 = 250, x4 = 3.1, x5 = 7.3, and x6 = 2, use a computer to forecast x1 = annual net sales and find an 80% confidence interval for your forecast (if your software produces prediction intervals). (Use 2 decimal places.) forecast lower limit upper limit (g) Construct a new regression model with x4 as the response variable and x1, x2, x3, x5, and x6 as explanatory variables. (Use 2 decimal places for the intercept, 4 for x1, 5 for x3, and 3 otherwise.) x4 = + x1 + x2 + x3 + x5 + x6 Suppose an All Greens store in Sonoma, California, wants to estimate a range of advertising costs appropriate to its store. If it spends too little on advertising, it will not reach enough customers. However, it does not want to overspend on advertising for this type…
A. Use a 1% level of significance to test the claim that ? < 0. (Round your answers to two decimal places.)t = critical t = B. Find an 80% confidence interval for y when x = 38 meters. (Round your answers to two decimal places.)lower limit hr upper limit hr
The weights of running shoes are normally distributed with an unknown population mean and standard deviation. If a random sample of 23 running shoes is taken and results in a sample mean of 12 ounces and sample standard deviation of 3 ounces, find the margin of error for a 95% confidence interval estimate for the population mean and construct the interval. Round the final answers to two decimal places. ME = C.I. = ( , )
A sample of 36 students are drawn from the NUST student population, and their body weights are measured. Their results show a mean weight of 84 kg with a standard deviation of 14.8 kg. When constructing a confidence interval estimate for the single unknown population mean weight for the NUST student population, What will be the lower limit (LL) for this confidence interval estimate? a. 75.55 b. 80.40 c. 90.45 d. None of the provided Due to the sharp increase in the prices of urban properties over the last five years, only a small percentage of new city dwellers can afford to buy their own property. According to a recent survey, only 22% of these new city dwellers can afford to buy their own property. An estate agency who wanted to verify this, considered a random sample of 200 recent city dwellers, and found that only 38 of them bought their property in town. Test at the 5% significance level whether the percentage has changed. State the alternative hypothesis a. Ha :…
A simple random sample of IQ scores is selected from a normally distributed population of statistics professors. The sample statistics are n=18,x=134 , s=11. Determine the critical value of t and the margin of error, and then construct the 95% confidence interval estimate for the population mean.
For parts a and b, use the t tables, software, or a calculator to estimate. For parts c and d, use software or a calculator to estimate. a) the critical value of t for a 95% confidence interval with df=15. b) the critical value of t for a 90% confidence interval with df=61. c) the P-value for t≥1.66 with 10 degrees of freedom. d) the P-value for t>2.46 with 24 degrees of freedom. LOADING... Click the icon to view the t table. a) What is the critical value of t for a 95% confidence interval with df=15? nothing (Round to two decimal places as needed.) b) What is the critical value of t for a 90% confidence interval with df=61? nothing (Round to two decimal places as needed.) c) What is the P-value for t≥1.66 with 10 degrees of freedom? nothing (Round to three decimal places as needed.) d) What is the P-value for t>2.46 with 24 degrees of freedom? nothing (Round to three decimal places as needed.)