Question

(2) Indicate which of the following are discrete measurements and which are continuous

measurements:

Discrete Continuous

___ ___ a) life of a Dell monitor

___ ___ b) waist size of NFL football players

___ ___ c) mileage of Japanese cars

___ ___ d) length of New York City NYC rats

___ ___ e) weight of human brains

___ ___ f) number of left-handed people on basketball teams

___ ___ g) time to complete the task of assembling a computer

___ ___ h) amount of fat in cheese

___ ___ i) number of male students in each statistics class

___ ___ j) speed of Japanese trains

___ ___ k) number of bedrooms in your home

(3) Indicate which of the following is a parameter and which is a statistic:

Parameter Statistic

___ ___ a) population mean

___ ___ b) population standard deviation

___ ___ c) sample standard deviation

___ ___ d) population variance

___ ___ e) population median

___ ___ f) sample mean

___ ___ g) a mean obtained from a country census

___ ___ h) a mean obtained from sampling 2,000 American driving trucks

___ ___ i) a mean obtained from sampling 10,000 teenagers on Facebook

___ ___ j) average number of defects: a company manufactures 5,000 electron

microscopes and tests them all.

(4) For each of the following, indicate the appropriate statistical measures that may be used for

analysis (e.g., proportions, median, quantiles, mode, mean, …). List as many as are appropriate.

a) For data measured on a nominal scale, you may use: ___________________________

b) For data measured on an ordinal scale, you may use: ___________________________

c) For data measured on an interval scale, you may use: ___________________________

(5) Dell Computers manufactures 1,000 super computers. A researcher wants a sample of 50 of

them. Each of the computers are assigned numbers and then random numbers are used so that

every computer has an equal chance of being selected (5%).

a) This is known as a: ___________________.

b) Measurements obtained from this are known as: ___________________.

c) Suppose the researcher decides to sample 1,000 computers. This is called a

_________________.

d) Any measurement obtained is known as a ________________.

Answer 1

2.

Continuous   a) life of a Dell monitor   

Discrete b) waist size of NFL football players

Continuous c) mileage of Japanese cars [But for sake of simplicity this data can be recorded as dicrete]

Continuous d) length of New York City NYC rats

Continuous e) weight of human brains

Discrete f) number of left-handed people on basketball teams

Continuous g) time to complete the task of assembling a computer

Continuous h) amount of fat in cheese

Discrete i) number of male students in each statistics class

Continuous j) speed of Japanese trains

Discrete k) number of bedrooms in your home

3.

Any measure related to population is  parameter , and any measure related to sample is statistic

Parameter a) population mean

parameter b) population standard deviation

statistic c) sample standard deviation

parameter   d) population variance

parameter e) population median

statistic f) sample mean

parameter g) a mean obtained from a country census

statistic    h) a mean obtained from sampling 2,000 American driving trucks

statistic i) a mean obtained from sampling 10,000 teenagers on Facebook

parameter    j) average number of defects: a company manufactures 5,000 electron

4.

a) For data measured on a nominal scale, you may use: Proportions , mode

b) For data measured on an ordinal scale, you may use:   Proportions , mode

c) For data measured on an interval scale, you may use: Mean, Median , Quartiles, Proportions , mode

5.

Dell Computers manufactures 1,000 super computers. A researcher wants a sample of 50 of

them. Each of the computers are assigned numbers and then random numbers are used so that

every computer has an equal chance of being selected (5%).

a) This is known as a: random sampling .

b) Measurements obtained from this are known as: statistic

c) Suppose the researcher decides to sample 1,000 computers. This is called a

cencus / complete enumeration .

d) Any measurement obtained is known as a parameter ,.