Reference no: EM132857036

1.) Which of the following is the definition of a statistic.

a.) a numerical description for a population.

b.) a numerical description for a sample.

c.) an estimate for the population mean.

d.) an estimate for the sample mean.

2.) Which of the following is the definition of a data set that represents a population?

a.) a subset of all outcomes of interest.

b.) a collection of half of the outcomes of interest.

c.) a subset of outcomes in a sample.

d.) a collection of all outcomes of interest.

3.) Which of the following is the term/phrase used to describe the phenomenon that happens when a subject reacts favorably to a false treatment in an experiment?

a.) Blinding

b.) Placebo effect

c.) Control group

d.) Replication

4) The times of a day a person makes a phone call are shown below.

7:35AM 9:26AM 11:57AM 1:13PM 5:02PM 8:31PM

What is the data set's level of measurement?

a.) Nominal

b.) Ordinal

c.) Interval

d.) Ratio

5.) Which of the following is not a property of a "well designed experiment"?

a.) Background check for subjects

b.) Double blinding

c.) Randomization

d.) Large sample size

6.) Which of the following is the term/phrase used when subjects in an experiment do not know if they are receiving the actual treatment or a placebo?

a.) Blinding

b.) Placebo effect

c.) Control group

d.) Replication

7.) Which of the following is the sampling technique that chooses members at regular intervals (every h individual, where equals the population size divided by the desired sample size)?

a.) Simple Random Sampling

b.) Cluster Sampling

c.) Systematic Sampling

d.) Stratified Sampling

8.) How will an outlier affect the mean/median of a data set?

a.) The mean will be pulled in the direction of the outlier; the median will remain unaffected.

b.) The mean will be pulled in the opposite direction of the outlier; the median will remain unaffected.

c.) The median will be pulled in the direction of the outlier; the mean will remain unaffected.

d.) The median will be pulled in the opposite direction of the outlier; the mean will remain unaffected.

9.) Suppose you are creating a frequency distribution for a data set and one of the classes has a relative frequency of 0.23. What does this mean?

a.) The class has a mode of 23.

b.) The class has 23 data entries.

c.) 23% of the data lies outside this class.

d.) 23% of the data lies within this class.

10.) Which of the following is true about standard deviation?

a.) Standard deviation has the squared units as the data entries.

b.) Standard deviation has the same units as the data entries.

c.) Standard deviation does not have units.

d.) Standard deviation has the same units as variance.