Mathematics, 04.02.2021 01:40 glogaming16
3 Questions -
1: A set of math tests is normally distributed with a mean of 81 and a standard deviation of 5. If Adam’s z-score was -0.6 and Leah’s z-score was 2.2, how many points higher did Leah score than Adam?
2: The number of homes sold each year by a realtor is normally distributed with a mean of 54. If the realtor sold 36 homes last year with a z-score of -2.4, what is the standard deviation?
3: The 400-meter race times recorded in the boys track meet was normally distributed with a standard deviation of 3 seconds. If David finished the race in 51.2 seconds with a z-score of -2.6, what was the mean time?
Answers: 1
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Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv
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Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?
Answers: 2
3 Questions -
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