The quantitative data set under consideration has roughly abell-shaped distribution. Apply the empirical rule to answer the following question.

A quantitative data set has mean 16 and standard deviation 1. Approximately what percentage of the observations lie between 14 and 18?

Approximately ( ? ) % of the observations lie between 14 and 18.

(Type an integer or a decimal. Round to one decimal place asneeded.)

3 The following table provides a frequency distribution for the number of rooms in thiscountry's housing units. The frequencies are in thousands.

Rooms No. of units

1 546

2. 1,405

3 10,954

4 23,354

5 27,970

6 24,612

7 1.4,694

8+ 17,287

a. Find the probability that the housing unit obtained has four rooms.

The probability is ( ? ) (Round to three decimal places asneeded.)

b. Find the probability that the housing unit obtained has more than four rooms.

The probability is ( ? ) (Round to three decimal places asneeded.)

c. Find the probability that the housing unit obtained has one or two rooms.

The probability is ( ?) (Round to three decimal places asneeded.)

d. Find the probability that the housing unit obtained has fewer than one room.

The probability is (?). (Round to three decimal places asneeded.)

e. Find the probability that the housing unit obtained has one or more rooms.

The probability is ( ? ) (Round to three decimal places asneeded.)