subject
Mathematics, 03.08.2019 03:20 ehazlitt

Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. a study was then done to see if the mean time has increased in the new century. a random sample of 27 first-time convicted burglars in a recent year was picked. the mean length of time in jail from the survey was four years with a standard deviation of 1.9 years. suppose that it is somehow known that the population standard deviation is 1.4. conduct a hypothesis test to determine if the mean length of jail time has increased. assume the distribution of the jail times is approximately normal. calculate the following. (enter exact numbers as integers, fractions, or decimals.) (a) x (b) σ (c) sx (d) n

ansver
Answers: 3

Another question on Mathematics

question
Mathematics, 21.06.2019 13:30
In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w
Answers: 1
question
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
question
Mathematics, 21.06.2019 22:00
Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr
Answers: 3
question
Mathematics, 21.06.2019 22:30
Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.
Answers: 1
You know the right answer?
Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burg...
Questions
question
Arts, 04.12.2020 20:50
question
Mathematics, 04.12.2020 20:50
Questions on the website: 13722367