Mathematics, 05.05.2020 01:55 bxbysoso
The amount of time it takes a mechanic to rebuild the transmission for a 2015 Cavalier car is being studied. A random sample of 36 mechanics who rebuild that transmission has a sample mean of 8.7 hours with a sample standard deviation of 2.1 hours. Construct a 90% confidence interval of the population mean time it takes a mechanic to rebuild the transmission. State the requirements, find the confidence interval to 2 decimal places, write a sentence that correctly interprets the confidence interval.
Answers: 3
Mathematics, 21.06.2019 19:30
The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)
Answers: 3
Mathematics, 21.06.2019 20:00
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, how much did almost all (99.7%) of the students spend on textbooks in a semester?
Answers: 2
Mathematics, 21.06.2019 21:00
The description below represents function a and the table represents function b: function a the function is 5 more than 3 times x. function b x y −1 2 0 5 1 8 which statement is correct about the slope and y-intercept of the two functions? (1 point) their slopes are equal but y-intercepts are not equal. their slopes are not equal but y-intercepts are equal. both slopes and y intercepts are equal. neither slopes nor y-intercepts are equal.
Answers: 3
Mathematics, 21.06.2019 22:10
Aadc is formed by reflecting aabc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of aadc is square units.
Answers: 3
The amount of time it takes a mechanic to rebuild the transmission for a 2015 Cavalier car is being...
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