Mathematics, 19.10.2019 03:10 harris435942
Asurvey is being planned to determine the mean amount of time corporation executives watch television. a pilot survey indicated that the mean time per week is 12 hours, with a standard deviation of 3 hours. it is desired to estimate the mean viewing time within one quarter hour. the 0.95 degree of confidence is to be used. how many executives should be surveyed?
Answers: 1
Mathematics, 21.06.2019 17:00
How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits
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Mathematics, 21.06.2019 18:00
The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?
Answers: 1
Mathematics, 21.06.2019 22:00
Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4
Answers: 2
Asurvey is being planned to determine the mean amount of time corporation executives watch televisio...
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