Given : The long-distance calls made by the employees of a company are normally distributed with a mean of 6.3 minutes and a standard deviation of 2.2 minutes

i.e. $\mu = 6.3$ minutes

$\sigma=2.2$ minutes

Let x be the long-distance call length.

a. The probability that a call lasts between 5 and 10 minutes will be :-

$P(5$

b. The probability that a call lasts more than 7 minutes. :

$P(X>7)=P(\dfrac{X-\mu}{\sigma}>\dfrac{7-6.3}{2.2})\\\\=P(Z>0.318)\ \ \ \ [z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Z$

c. The probability that a call lasts more than 4 minutes. :

$P(X$

8 0

3 years ago

Belize is a small country in Central America. The

shepuryov [24]

Answer:

60 inches

Step-by-step explanation:

<em>30% of 200 inches = 200 inches * 30%</em>

Substitute: 200 inches * 0.3

Multiply: 60 inches

5 0

3 years ago

The bottom of a ladder must be placed 4 feet from the base of a pole barn. The ladder is 14 feet long. How far above the ground

marusya05 [52]

Check the picture below.

3 0

3 years ago

Why would a number line be divided into 20 parts?

prohojiy [21]

Answer:

_ _

1 2 all the way to twenty

Step-by-step explanation:

6 0

2 years ago