An instructor for a test preparation course claims that the course will improve the test scores...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took the test. Before taking the test for the second time, the students took the instructor's course to try to improve their critical reading test scores. At a = 0.01, is there enough evidence to support the instructor's claim? Complete parts (a) through (f). 12 3 4 5 9 10 11 12 13 14 0 607 515 557 458490 368 595 454 326 440 399 448 406 422 Score on second test 608 543 576 475 452 392 540 462 327 442 443 473 421 460 Student 7 8 Score on first test (a) Identify the claim and state Hg and Ha. The claim is "The students' critical reading test scores the second time they took the test." Let u, be the hypothesized mean of the students' first score minus their second score. State H, and H,. Choose the correct answer below. O A. Ho: Ha zd O B. Hg: Ha *0 Ha: Ha =0 OC. Ho: Ha =0 O D. Hg: Ha sa O E. Ho: Ha s0 H: Ha >0 OF. Ho: Ha 20 H Ha 0 (b) Find the critical value(s) and identify the rejection region(s). to -O (Use a comma to separate answers as needed. Type an integer or a decimal. Round to three decimal places as needed.) Identify the rejection region(s). Choose the correct answer below. O A. t< - 3.012 or t> 3.012 O B. t> 3.012 O c. t< -2.650 or t> 2.650 O D. t< -2.650 (c) Calculate d and s (Type an integer or a decimal, Round to three decimal places as needed.) Calculate sa- (Type an integer or a decimal. Round to three decimal places as needed.) (d) Use the t-test to find the standardized test statistic t. t= (Type an integer or a decimal. Round to three decimal places as needed.) (e) Decide whether to reject or fail to reject the nuli hypothesis. Choose the correct answer below. Reject the nuil hypothesis. Fail to reject the null hypothesis. (f) Interpret the decision in the context of the original claim. Choose the correct answer below. O A. At the 1% significance level, there is evidence that the students' critical reading scores got worse the second time they took the test. B. At the 1% significance level, there is not enough evidence that the students' critical reading scores improved the second time they took the test. OC. The sample was not large enough to make a conclusion. O D. At the 1% significance level, there is enough evidence that the students' critical reading scores improved the second time they took the test. An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took the test. Before taking the test for the second time, the students took the instructor's course to try to improve their critical reading test scores. At a = 0.01, is there enough evidence to support the instructor's claim? Complete parts (a) through (f). 12 3 4 5 9 10 11 12 13 14 0 607 515 557 458490 368 595 454 326 440 399 448 406 422 Score on second test 608 543 576 475 452 392 540 462 327 442 443 473 421 460 Student 7 8 Score on first test (a) Identify the claim and state Hg and Ha. The claim is "The students' critical reading test scores the second time they took the test." Let u, be the hypothesized mean of the students' first score minus their second score. State H, and H,. Choose the correct answer below. O A. Ho: Ha zd O B. Hg: Ha *0 Ha: Ha =0 OC. Ho: Ha =0 O D. Hg: Ha sa O E. Ho: Ha s0 H: Ha >0 OF. Ho: Ha 20 H Ha 0 (b) Find the critical value(s) and identify the rejection region(s). to -O (Use a comma to separate answers as needed. Type an integer or a decimal. Round to three decimal places as needed.) Identify the rejection region(s). Choose the correct answer below. O A. t< - 3.012 or t> 3.012 O B. t> 3.012 O c. t< -2.650 or t> 2.650 O D. t< -2.650 (c) Calculate d and s (Type an integer or a decimal, Round to three decimal places as needed.) Calculate sa- (Type an integer or a decimal. Round to three decimal places as needed.) (d) Use the t-test to find the standardized test statistic t. t= (Type an integer or a decimal. Round to three decimal places as needed.) (e) Decide whether to reject or fail to reject the nuli hypothesis. Choose the correct answer below. Reject the nuil hypothesis. Fail to reject the null hypothesis. (f) Interpret the decision in the context of the original claim. Choose the correct answer below. O A. At the 1% significance level, there is evidence that the students' critical reading scores got worse the second time they took the test. B. At the 1% significance level, there is not enough evidence that the students' critical reading scores improved the second time they took the test. OC. The sample was not large enough to make a conclusion. O D. At the 1% significance level, there is enough evidence that the students' critical reading scores improved the second time they took the test.
Expert Answer:
Related Book For
Elementary Statistics Picturing the World
ISBN: 978-0134683416
7th edition
Authors: Ron Larson, Betsy Farber
Posted Date:
Students also viewed these mathematics questions
-
An instructor for a SAT preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 10 students the first two times they took...
-
An instructor for a SAT preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 10 students the first two times they took...
-
An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took...
-
The object is used to execute a static Oracle query, but the object is used to execute a dynamic Oracle query with IN and OUT parameters. a. PreparedStatement, Statement b. Statement,...
-
Choose three or four other students and make up a team. Create a marketing plan to increase enrollment in your school. Describe the four marketing mix elements that make up the plan.
-
The management of First American Bank was concerned about the potential loss that might occur in the event of a physical catastrophe such as a power failure or a fire. The bank estimated that the...
-
Founded in 1966 as a trader of oil and oil products, Vitol is a company with no external shareholders. All shareholders are also employees. It is a conglomerate company of energy companies that work...
-
Nogel Corporation secured authorization from the state for 200,000 shares of $10 par value common stock. It has 80,000 shares issued and 70,000 shares outstanding. On June 5, the board of directors...
-
Consider graph G below. We want to construct a minimum spanning tree out of that. In what order are edges will be added to the Minimum Spanning Tree (MST) using Kruskal's Algorithm? Order is from...
-
Holman Electronics manufactures audio equipment, selling it through various distributors. Holmans days sales outstanding (Accounts receivable/Average daily credit sales) figures increased steadily in...
-
Assuming that AG uses the percent of sales allowance method and estimates uncollectible receivables at 5 The inventory purchases were in order of purchases 10000 units at 100unit 5000 units at...
-
eve a b ovo 0/0 d Figure 1 0/1 a/s 2/1 4./0 36 d 1/1 Figure 2 0/0 4,0 Present state b e d e Next state X=0 b b b . X=1 C d C d b original state table X=0 0 ... 1 Output O X=1 O O O O O NO 9/0 9/1 d...
-
PROBLEM 2: A spacecraft launched from the European Space Port in Kourou (French Guyana) has as destination Longitude 90 degree at the Geostationary Equatorial Orbit. List the maneuvers needed to put...
-
The cue ball going 9 m/s heads directly toward a 0.17 kg object ball at rest near the pocket. During the elastic collision, the cue ball stops and the object ball is launched forward at 9 m/s. What...
-
As shown below, particle C is located at (0 cm, 16 cm), particle D is at the origin, & particle E is at (16 cm, 0 cm). Additionally, ac = 4 C, qp = -2 C, & q = 3 C. D E A.) Determine the magnitude &...
-
Helen, age 18, is claimed by her parents as a dependent. Duri ng 2023, she had interest income from a bank savings account of $2,000 and earnings from a part-time job of $6,200. Helen's taxable...
-
The process of creating value innovation in the banking services industry can be obtained from novelty and complementarity factors. Explain about value innovation? Looking at industries that are not...
-
Refer to the data for problem 13-36 regarding Long Beach Pharmaceutical Company. Required: Compute each division's residual income for the year under each of the following assumptions about the...
-
Find the probability of randomly selecting a school with 300 or more students. Use the pie chart at the left, which shows the percent distribution of the number of students in U.S. public schools in...
-
Find the margin of error for the values of c, s, and n. c = 0.98, s = 4.7, n = 9
-
The numbers of hours spent studying per day by a sample of 28 students Use technology to draw a box-and-whisker plot that represents the data set. 2 8 7 2 3 3 3 2 2 7 8 3 5 1 1 2 6 1 5 7 3 8 5 3 3 7...
-
In mice, the copy of the Igf 2 gene that is inherited from the mother is never expressed in her offspring. This happens because the Igf 2 gene from the mother a. always undergoes a mutation that...
-
A female snail that coils to the left has offspring that coil to the right. What are the genotypes of this mother and of the maternal grandmother of the offspring, respectively? a. dd, DD b. Dd, Dd...
-
A cross is made between a green four-oclock plant and a variegated one. If the variegated plant provides the pollen, the expected outcome of the phenotypes of the offspring will be a. all plants with...
Study smarter with the SolutionInn App