A researcher is ivestigating 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 second graders is o 25.24. Group 1 consists of ni = 52 second graders who did not participate in the program. Their mean reading comprehension score is Mi = 36.8. Group 2 consists of na = 56 second graders who did participate in the program. Their mean reading comprehension score is Ma = 52.4. or the plots that follow, which best represents a plot of these results? O Plot B O Plot A O Plot C O Plot D Plot A Plot B go2 Plot C

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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 o = 25.24.
Group 1 consists of ni = 52 second graders who did not participate in the program. Their mean reading comprehension score is Mi = 36.8. Group 2
consists of na = 56 second graders who did participate in the program. Their mean reading comprehension score is Ma = 52.4.
or the plots that follow, which best represents a plot of these results?
O Plot B
O Plot A
O Plot C
O Plot D
Plot A
Plot B
Grp
Grp
Plot C
Plot D
Transcribed Image Text: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 o = 25.24. Group 1 consists of ni = 52 second graders who did not participate in the program. Their mean reading comprehension score is Mi = 36.8. Group 2 consists of na = 56 second graders who did participate in the program. Their mean reading comprehension score is Ma = 52.4. or the plots that follow, which best represents a plot of these results? O Plot B O Plot A O Plot C O Plot D Plot A Plot B Grp Grp Plot C Plot D
Plot A
Plot B
Grp
Grp
Plot C
Plot D
15-
grou2
Grp
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
v units above and below the mean for group 1.
Transcribed Image Text:Plot A Plot B Grp Grp Plot C Plot D 15- grou2 Grp 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 v units above and below the mean for group 1.
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