In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The responses were normally distributed, with a mean of

5.5

and a standard deviation of

2.1.

Answer parts

(a)-(d)

below.

Question content area bottom

Part 1

(a) Find the probability that a randomly selected study participant's response was less than

4.

The probability that a randomly selected study participant's response was less than 4 is

0.237530.23753.

(Round to four decimal places as needed.)

Part 2

(b) Find the probability that a randomly selected study participant's response was between

4

and

6.

The probability that a randomly selected study participant's response was between

4

and

6

is

enter your response here.

(Round to four decimal places as needed.)