Assume that the foot length of an arbitrarily picked grown-up male is an ordinary irregular variable with mean =11 and standard deviation =1.5. With this data complete the accompanying and fill in spaces.

1)

a) What is the likelihood that a haphazardly picked grown-up male will have a foot length somewhere in the range of 8 and 14 inches?

P(8 < r < 14) = _____ or ______%

b) A grown-up male is practically ensured (0.997 likelihood) to have a foot length between what two qualities?

P(_____< r < ______)= 0.997

2) The likelihood is just 2.5 % that a grown-up male will have a foot length more prominent than what number of inches?

P(r > _____) =0.025

3) What is the likelihood that an arbitrarily chosen male will have a foot length somewhere in the range of 8 and 12.5 inches?

P(8 < r < 12.5) = _______ or ________%

Rosa Walters is thinking about putting $10,000 in two common assets. The expected gets back from value appreciation and profits (in many dollars) are depicted by the accompanying likelihood appropriations.

Shared Fund A

Brings Probability back

2

0.3

8

0.4

10

0.3

Shared Fund B

Brings Probability back

2

0.4

7

0.3

8

0.3

(a) Compute the mean and change for Mutual Fund A.

mean __ dollars

change __ dollars2

Figure the mean and change for Mutual Fund B.

mean dollars

change dollars2

(b) Which speculation would furnish Rosa with the most noteworthy anticipated return (the more prominent mean)?

A)Mutual Fund A

B)Mutual Fund B

(c) Which speculation has the lesser component of hazard (that is, which likelihood dispersion has the more modest change)?

A)Mutual Fund A

B)Mutual Fund B

A Christmas tree light has a normal existence of 220 hr and a standard deviation of 2 hr.

(a) Find a bound on the likelihood that one of these Christmas tree lights will require substitution between 210 hr and 230 hr.

at any rate __ %

(b) Suppose a huge city utilizes 180,000 of these Christmas tree lights as a feature of its Christmas enrichments. Gauge the quantity of lights that are probably going to require substitution between 200 hr and 240 hr of utilization.

..10..

__ lights

The accompanying table gives the best 12 nations on the planet whose populaces have the most elevated centralization of a particular kind of blood.

Country Brazil Spain Norway Australia Netherlands Belgium

Populace (%) 9.0 9.0 8.2 8.0 8.0 8.0

Country United

Kingdom France Denmark Sweden Austria Portugal

Populace (%) 8.0 8.0 8.0 8.0 8.0 7.6

Track down the mean (normal), middle, and method of these centralizations of that blood classification in these 12 nations.

mean __ %

middle __ %

mode __ %