# 4.11: Chapter 6 Solution (Practice + Homework)

- Page ID
- 51793

**1**.

ounces of water in a bottle

**3**.

2

**5**.

–4

**7**.

–2

**9**.

The mean becomes zero.

**11**.

\(z = 2\)

**13**.

\(z = 2.78\)

**15**.

\(x = 20\)

**17**.

\(x = 6.5\)

**19**.

\(x = 1\)

**21**.

\(x = 1.97\)

**23**.

\(z = –1.67\)

**25**.

\(z \approx –0.33\)

**27**.

0.67, right

**29**.

3.14, left

**31**.

about 68%

**33**.

about 4%

**35**.

between –5 and –1

**37**.

about 50%

**39**.

about 27%

**41**.

The lifetime of a Sunshine CD player measured in years.

**43**.

\(P(x < 1)\)

**45**.

Yes, because they are the same in a continuous distribution: \(P(x = 1) = 0\)

**47**.

\(1 – P(x < 3)\) or \(P(x > 3)\)

**49**.

\(1 – 0.543 = 0.457\)

**51**.

0.0013

**53**.

0.1186

**55**.