Mathematics, 31.03.2021 23:20 daijafoster0

Problem 1. We asked 6 students how many times they rebooted their computers last week. There were 4 Mac users and 2 PC users. The PC users rebooted 2 and 3 times. The Mac users rebooted 1, 2, 2 and 8 times. Let C be a Bernoulli random variable representing the type of computer of a randomly chosen student (Mac = 0, PC = 1). Let R be the number of times a randomly chosen student rebooted (so R takes values 1,2,3,8). (a) Create a joint probability table for C and R. Be sure to include the marginal probability mass functions.

(b) Compute E(C) and E(R).

(c) Determine the covariance of C and R and explain its significance for how C and R are related. (A one sentence explanation is all that’s called for.

Are R and C independent?

(d) Independently choose a random Mac user and a random PC user. Let M be the number of reboots for the Mac user and W the number of reboots for the PC user.

(i) Create a table of the joint probability distribution of M and W , including the marginal probability mass functions.

(ii) Calculate P (W >M).

(iii) What is the correlation between W and M?

Answers: 2

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 16:30

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks

Answers: 1

Answer

Mathematics, 21.06.2019 18:00

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Answers: 1

Answer

Mathematics, 21.06.2019 18:30

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Answers: 2

Answer

Mathematics, 21.06.2019 21:30

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

Answers: 1

Answer

You know the right answer?

Problem 1. We asked 6 students how many times they rebooted their computers last week. There were 4...

Questions