A researcher is investigating whether a reading intervention program improves reading comprehension for second graders. She collects a random sample of second graders and randomly assigns each second grader to participate in the reading intervention program or not participate in the program. The researcher knows that the standard deviation of the reading comprehension scores among all second graders is σ = 25.24.Group 1 consists of n₁ = 52 second graders who did not participate in the program. Their mean reading comprehension score is M₁ = 36.8. Group 2 consists of n₂ = 56 second graders who did participate in the program. Their mean reading comprehension score is M₂ = 52.4.Of the plots that follow, which best represents a plot of these results?Plot B Plot A Plot C Plot D The brackets or error bars shown at the top of each bar extend above and below each of the group means. For group 1, the error bar extends units above and below the mean for group 1. The image consists of four bar graphs, labeled as Plot A, Plot B, Plot C, and Plot D, each depicting data related to two groups. The y-axis of each plot represents the "Mean Score," while the x-axis represents the respective groups.### Plot A:- **Description:** This bar graph compares the mean scores of "group 1" and "group 2."- **Details:** - **Group 1** has a mean score of approximately 15. - **Group 2** has a mean score of approximately 25. - Each bar includes error bars, indicating variability or standard error around the mean.### Plot B:- **Description:** Another comparison between "group 1" and "group 2."- **Details:** - **Group 1** has a mean score of approximately 5. - **Group 2** has a mean score of approximately 30. - Error bars are present for both groups.### Plot C:- **Description:** This plot also compares the mean scores for two groups.- **Details:** - **Group 1** has a mean score of approximately 30. - **Group 2** has a mean score of approximately 40. - Error bars are shown, illustrating the range of scores.### Plot D:- **Description:** This plot displays the mean scores of the two groups with distinct values.- **Details:** - **Group 1** has a mean score of approximately 20. - **Group 2** has a mean score of approximately 50. - Both bars have error bars to indicate the measure of error or statistical variance.Each plot demonstrates differences in mean scores between two groups, with error bars that help visualize the confidence in the data's precision.

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Answered: A researcher is investigating whether a…

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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A researcher is investigating whether a reading intervention program improves reading comprehension for second graders. She collects a random sample of second graders and randomly assigns each second grader to participate in the reading intervention program or not participate in the program. The researcher knows that the standard deviation of the reading comprehension scores among all second graders is σ = 25.24.

Group 1 consists of n₁ = 52 second graders who did not participate in the program. Their mean reading comprehension score is M₁ = 36.8. Group 2 consists of n₂ = 56 second graders who did participate in the program. Their mean reading comprehension score is M₂ = 52.4.

Of the plots that follow, which best represents a plot of these results?

Plot B

Plot A

Plot C

Plot D

The brackets or error bars shown at the top of each bar extend above and below each of the group means. For group 1, the error bar extends units above and below the mean for group 1.