Mathematics, 13.05.2021 22:40, 1315055427
A study has been done to test the effect of rock music on auditory attention. Eighteen eighth-grade students are randomly divided into two groups of 9 students, and the same hearing test was given to these students. The first group of students listened to rock music for 25 minutes right before taking the test, and the other group of students took the test without listening to the music. Here are their scores.
Group with music: 78 85 87 93 97 80 94 88 86
Group without music: 64 66 77 84 63 72 85 79 80
Assume normal populations with equal variance and construct a 95% confidence interval for the mean difference.
Find the lower bound of the confidence interval (round off to the nearest integer).
Answers: 1
Mathematics, 21.06.2019 16:30, stefancvorovic1
The equation of a circle is (x - 3)2 + (y - 7)2 = 25. determine the length of the radius. 4 25 12.5 5 write the standard equation of the circle with center (2, 3) and a diameter of 12. (x - 2)2 + (y - 3)2 = 36 (x + 2)2 + (y + 3)2 = 12 (x - 2)2 + (y - 3)2 = 6 (x - 3)2 + (y - 2)2 = 36 the equation of a circle is (x + 3)2 + (y + 7)2 = 25. where is (3, 4) located in relation to the circle? on the circle in the interior of the circle in the exterior of the circle at the center of the circle
Answers: 1
Mathematics, 21.06.2019 20:20, shartman22
20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}
Answers: 2
Mathematics, 21.06.2019 23:50, lanettejohnson355
What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is
Answers: 2
A study has been done to test the effect of rock music on auditory attention. Eighteen eighth-grade...
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