Mathematics, 10.01.2020 06:31 otblilbro
The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20.according to the standard deviation rule, in a semester, most (95%) of the students spent on textbooks: a. between 215 and 255 dollars. b. between 195 and 275 dollars. c. between 175 and 295 dollars. d. less than 215 dollars or more than 255 dollars. e. above 235 dollars.
Answers: 3
Mathematics, 21.06.2019 18:40
2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?
Answers: 1
Mathematics, 21.06.2019 21:50
Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d
Answers: 1
Mathematics, 22.06.2019 02:30
Solve the system of equations. 2x-2y=-4 and x+y=8. show work
Answers: 1
The distribution of the amount of money spent by students for textbooks in a semester is approximate...
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