Mathematics, 19.01.2021 17:50 manuel6885

ACT scores for the 1,171,460 members of the 2004 high school graduating class who took the test closely followed the Normal distribution with mean 20.9 and standard deviation 4.8. Choose two
students independently and at random from this group
A) What is the expected sum of their scores?
B) What is the expected difference of their scores?
C) What is the standard deviation of the difference in their scores?
Assuming the scores are independent
Round to 4 places after the decimal
Find the probability that the sum of their scores is greater than 50.
Round to 4 places after the decimal

Answers: 1

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 14:30

Paint color preference children adults total 0.6 0.77 liked new paint color disliked new paint color 0.4 0.15 0.23 total 1.0 1.0 1.0 which value for x completes the conditional relative frequency table by column?

Answers: 2

Answer

Mathematics, 21.06.2019 14:30

30 points and i will give brainliest the club will base its decision about whether to increase the budget for the indoor rock climbing facility on the analysis of its usage. the decision to increase the budget will depend on whether members are using the indoor facility at least two times a week. use the best measure of center for both data sets to determine whether the club should increase the budget. assume there are four weeks in a month. if you think the data is inconclusive, explain why.

Answers: 3

Answer

Mathematics, 21.06.2019 17:30

Which are factor pairs of 350? choose all answers that are correct. a) 30 and 12 b) 35 and 10 c) 70 and 5 d) 2 and 125

Answers: 2

Answer

Mathematics, 21.06.2019 19:20

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Answers: 2

Answer

You know the right answer?

ACT scores for the 1,171,460 members of the 2004 high school graduating class who took the test clo...

Questions

Mathematics, 22.01.2020 09:31

What is the least common denominator of the equation 3/4 (x-3)-1/2=2/3 / wit this one ..a.2 b.9 c.12 d.36...

Mathematics, 22.01.2020 09:31

Which expression is a sum of cubes?...

Mathematics, 22.01.2020 09:31

The answer to this difficult problem...