This is Stats I need some help on this question

7,8,9,10

7.Colleges in United States Currently, there are 4612 colleges in the United States, and the

number of full-time students is 13,203,477.

a. Are the numbers of full-time students at different colleges discrete or continuous?

b. What is the level of measurement for the numbers of full-time students at colleges?

(nominal, ordinal, interval, ratio)

c. What is wrong with surveying college students by mailing questionnaires to 10,000 of them

who are randomly selected?

d. If we randomly select 50 full-time college students in each of the 50 states, what type of

sample is obtained? (random, systematic, convenience, stratified, cluster)

e. If we randomly select four colleges and survey all of their full-time students, what type of

sample is obtained? (random, systematic, convenience, stratified, cluster)

8. Percentages

a. The labels on U-Turn protein energy bars include the statement that these bars contain

"125% less fat than the leading chocolate candy brands" (based on data from Consumer Reports

magazine). What is wrong with that claim?

b. In a Pew Research Center poll on driving, 58% of the 1182 respondents said that they like to

drive. What is the actual number of respondents who said that they like to drive?

c. In a Pew Research Center poll on driving, 331 of the 1182 respondents said that driving is a

chore. What percentage of respondents said that driving is a chore?

9. Types of Data In each of the following, identify the level of measurement of the sample

data (nominal, ordinal, interval, ratio) and the type of sampling used to obtain the data (random,

systematic, convenience, stratified, cluster).

a. At Albany Medical Center, every 10th newborn baby is selected and the body temperature is

measured (degrees Fahrenheit).

b. In each of the 50 states, 50 voters are randomly selected and their political party affiliations

are identified.

c. A pollster stops each person passing her office door and asks the person to rate the last

movie that he or she saw (on a scale of 1 star to 4 stars).

10. Statistical Significance and Practical Significance The Technogene Research Group

has developed a procedure designed to increase the likelihood that a baby will be born a girl.

In a clinical trial of their procedure, 236 girls were born to 450 different couples. If the method

has no effect, there is about a 15% chance that such extreme results would occur. Does the

procedure appear to have statistical significance? Does the procedure appear to have practical significance