# Qnt 561 Week 1

Assignment Week 1

QNT/561

Chapter 3

80. Creek Ratz is a very popular restaurant located along the coast of northern Florida. They serve a variety of steak and seafood dinners. During the summer beach season, they do not take reservations or accept “call ahead” seating. Management of the restaurant is concerned with the time a patron must wait before being seated for dinner. Listed below is the wait time, in minutes, for the 25 tables seated last Saturday night.

|23           |
|24           |
|24           |
|25           |
|27           |
|27           |
|28           |
|28           |
|28           |
|29           |
|34           |
|37           |
|39           |
|40           |
|44           |
|44           |
|45           |
|50           |
|51           |
|56           |
|61           |
|61           |
|64           |
|65           |
|67           |
|1021         |
|40.84         |

a. Explain why the times are a population.

El tiempo de espera es y se tratan como una populación, ya que al tener una gran cantidad de clientes esperando puede crear no tan solo molestia para los clientes sino también puede crear una perdida para la gerencia de los restaurantes.

b. Find the mean and median of the times.

Mean= 40.84

Median= 39

c. Find the range and the standard deviation of the times

Range: 44

Standard Deviation: 14.8

82. The following frequency distribution reports the electricity cost for a sample of 50 two bedroom apartments in Albuquerque, New Mexico during the month of May last year.

| |Midpoint | |Frecuency | |M-X |(M-X)2 |F(M-X)2 | |80 |100 |90 | |3 | |270 |-51.2 |2621.4 |9525.8 | |100 |120 |110 | |8 | |880 |-31.2 |973.4 |7787.5 | |120 |140 |130 | |12 | |1560 |-11.2 |125.4 |1505.3 | |140 |160 |150 | |16 | |2400 |8.8 |77.4 |1239.0 | |160 |180 |170 | |7 | |1190 |28.8 |829.4 |5806.1 | |180 |200 |190 | |4 | |760 |48.8 |2381.4 |9525.8 | | | | |total |50...