A report looked at science scores among school children and compared science sco

Question

A report looked at science scores among school children and compared science scores for students who had home Intemet access with the scores of those who did not, as shown in the graph. The report stated that the differences were statistically significant. Complete parts a through d. Yes No 159 153 150 143 140 136 100 Choose the correct answer below A. The probability of observing these differences assuming that there were no difference was greater than 5%. O B. The differences that were observed between the group of students with Internet access and those without were too great to be attributed to natural sampling variation. C. The differences that were observed between the group of students with Internet access and those without were great enough to be important to teachers. b) If their conclusion is incorrect, what type of error did the researchers commit? The researchers commited a Type l error c) Does this prove that using the Intemet at home can improve a student's performance in science? Choose the correct answer below O A. O B. ° C. Yes No, because the results are "statistically significant" but might not have practical significance No, because there could be many other factors that are improving the student's performance in science d) What companies might be interested in this information Determine which type of company might use this information to market their services to parents. Choose the correct answer below O A. Private tutoring companies B. ° C. Textbook publishers Intemet service providers D. Education technology companies

Explanation / Answer

Answer to the questions below:

1. B is the right answer

2.In statistical hypothesis testing, a type I error is the incorrect rejection of a true null hypothesis (a "false positive"). We have committed Type 1 error here

3. A. Yes. Since we have proved statistically significant differences between the 2 groups

4. B is right. It is useful to ISPs because they provide internet. They can probable advertise these results and convince students to purchase internet by calling out the results of the experiment.

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