Response to the following question:
1. What is the differences between statistics as numerical facts and statistics as a discipline or field of study.
2. Consider the data set for the sample of 10 minisystems in Table 1.7
a. how many variables are in the data set?
b. Which of the variables are quantitative and which are qualitative?
c. Which is the average CD capacity for the sample?
d. What percentage of the minisystems provides and FM tuning rating of very good or excellent?
e. What percentage of the minisystems includes two tape decks?
BRAND PRICE SOUND QUAL. CD CAPAC. FM TUN. TAPE DECKS
Aiwa nsx-aj800 250 good 3 fair 2
Jvc fs-sd1000 500 good 1 very good 0
Jvc mx-g50 200 very good 3 excellent 2
Panasonic sc-pm11 170 fair 5 very good 1
Rca rs 1283 170 good 3 poor 0
Sharp cd-ba2600 150 good 3 good 2
Sony chc-cl1 300 very good 3 very good 1
Sony mhc-nx1 500 good 5 excellent 2
Yamaha gx-505 400 very good 3 excellent 1
Yamaha mcr-e100 500 very good 1 excellent 0
State whether each of the following variables is qualitative or quantitative and indicates its measurement scale.
a. annual sale
b. soft drink size (small, medium, large)
c. employee classification (GS1 through GS18)
d. earnings per share
e. method of payment (cash, check, credit card)
3. A seven-year medical research study reported that women whose mothers took the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as were women whose mothers did not take the drug.
A. this study involved the comparison of two populations. What were the populations?
b. Do you suppose the data were obtained in a survey or an experiment?
c. For the population of women whose mothers took the drug DES during pregnancy, a sample of 3980 women showed 63 developed tissue abnormalities that might lead to cancer. Provide a descriptive statistic that could be used to estimate the number of women out of 1000 in this population who have tissues abnormalities.
d. For the population of women whose mothers did not take the drug DES during pregnancy, what is the estimate of the number of women out of 1000 who would be expected to have tissues abnormalities?
e. Medical studies often use a relatively large sample (in this case 3980). Why?
- I need a short paragraph about a person that uses statistics in his/her work. Describe the type of statistics that is used. descriptive or inferential