Statistics Combining Random Variables

What is the branch of mathematics dealing with the collection, organization, analysis, interpretation and presentation of data?

• Algebra

• Geometry

• Probability

• Statistics

Find the value of k

• ¹/₁₅

• ¹/₅

• ¹/₁₀

• ¹/₁₄

Find P(X = 5)

• ¹¹/₃₆

• ¹/₄

• ⁵/₁₈

• ¹/₉

Find the value of q

• 0.85

• 0.15

• 0.25

• 0.05

The mean weight of a dog is 34 pounds with a standard deviation of 6.7 pounds. The mean weight of a cat is 12 pounds with a standard deviation of 3.1 pounds. If you have 2 dogs and 1 cat, what is the mean and standard deviation of their total weight?

• 80, 9.969

• 80, 16.5

• 46, 7.382

• 46, 16.5

Given:

X: mean = 48, standard d. = 5

Y: mean = 21, standard d. = 2

What is the standard deviation of Z if Z = X + Y

• 7.25

• 5.39

• 10.39

• 3.5

Find P(X < 5)

• 0.2

• 0.3

• 0.5

• 0.7

Find the value of k

• ¹/₆

• ¹/₁₄

• ¹/₁₁

• ¹/₁₅

Find the value of k

• ¹/₁₀

• ¹/₆

• ¹/₁₂

• ¹/₈

Find the value of p

• 0.9

• 0.1

• 0.3

• 0.15