Mathematics, 06.04.2021 01:40, seby951
A school district is considering moving the start of the school day at Groveland High from 8:00 a. m. to 9:00 a. m. to allow students to get more sleep at night. They want to estimate how many more hours of sleep teens get if their school starts at 9:00 a. m. compared to teens whose schools start at 8:00 a. m. The district takes random samples of 50 of students from Groveland High and 39 students from Phillips High School, which starts at 9:00 a. m., and surveys them about their sleep habits. The sample mean number of hours of sleep per student at Groveland is 7.1 hours, and the standard deviation is 1.7 hours. At Phillips, the sample mean is 8.3 hours of sleep, with a standard deviation of 1.9 hours. What is the 90% confidence interval for the difference in mean hours of sleep for students at the two high schools
Answers: 2
Mathematics, 21.06.2019 14:20, arnold2619
G(x) = 2 sin(2x - π) + 4. using complete sentences, explain how to find the minimum value for the function.
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Mathematics, 21.06.2019 17:50, beard6488
Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00
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Mathematics, 22.06.2019 01:30, Laners0219
Which represents the number of times all outcomes less than a given outcome occur? cumulative frequency relative frequency frequency cumulative relative frequency
Answers: 3
A school district is considering moving the start of the school day at Groveland High from 8:00 a. m...
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