Attempts: Keep the Highest: /3 6. Displaying sample means and their errors AaAa
ID: 3058083 • Letter: A
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Attempts: Keep the Highest: /3 6. Displaying sample means and their errors AaAa A researcher is investigating whether a reading intervention program improves reading comprehension for second graders. He collects a random sample of second graders and randomly assigns each second grader to partiipate in the reading intervention program or not partiipate in the program. The researcher knows that the standard deviation of the reading comprehension scores among all second graders is a - 11.54 Group 1 consists of ni 33 second graders who did not participate in the program. Their mean reading comprehension score is M 22.6. Group 2 consists of n2 65 second graders who did participate in the program. Their mean reading comprehension score is M2-34.1. of the plots that follow, which best represents a plot of these results? O Plot A O Plot B O Plot C O Plot D Plot A Plot B 50 40 45 351 25 25 25 20 14 15Explanation / Answer
Attempts: Keep the Highest: /3 6. Displaying sample means and their errors AaAa A researcher is investigating whether a reading intervention program improves reading comprehension for second graders. He collects a random sample of second graders and randomly assigns each second grader to partiipate in the reading intervention program or not partiipate in the program. The researcher knows that the standard deviation of the reading comprehension scores among all second graders is a - 11.54 Group 1 consists of ni 33 second graders who did not participate in the program. Their mean reading comprehension score is M 22.6. Group 2 consists of n2 65 second graders who did participate in the program. Their mean reading comprehension score is M2-34.1. of the plots that follow, which best represents a plot of these results? O Plot A O Plot B O Plot C O Plot D Plot A Plot B 50 40 45 351 25 25 25 20 14 15
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