统计学概论大作业

1.14

Range the units of the population in https://www.360docs.net/doc/bf11395107.html, each one by 1、2、……20,000. Then use a random number generator to get a simple:

182942 79574 63605 15497 133254 89923 185069 10011 171669 2839

These are what we need.

1.18

quantitative data includes:a c e f

qualitative data includes:b d

1.33

a.The experimental units are each engaged couple who participates the study.

b.The variables of interest are engagement ring price(dollar) and the appreciation of the recipient.

Engagement ring price(dollar) is quantitative data and the appreciation of the recipient is qualitative data.

c.The population of interest is all the couple which participate in the study.

d.No,I don’t. Because those who paid really high or low price for the ring were excluded and the population is too small.

e.Assign these to play the role of gift-giver and the others to play the gift-receiver.

These are the gift-giver:

35 32 17 28 24 37 50 33 13 47 15 2 34 29 12 12 33 16 48 9 12 29 43 11

1

*1.36

a.Per minute, 4000 cans will be produced. Every 15 minutes, five filled

cans are pulled off the line. The amount of carbon dioxide in each of these five cans is measured to determined whether the amount are within the prescribed limits.

b.The amount of carbon dioxide in each can and all the other cans.

c.The sample is the five cans pulled off every 15 minutes.

d.The inference of interest is the amount of carbon dioxide in all the

cans and whether it’ s within

The limits.

e.The technician will be examing a process. Because the population is

too big to be measured and a sample and a suitable process are enough to estimate the population.