On the answer sheet, write the number of the question and the letter that precedes the correct answer to each question.

Q1. Which of the following is a loaded question?

a. Do you play in an organized sporting competition on the weekends?

b. Do you support the development of atomic weapons that could kill millions of innocent people including children?

c. Are you a paying member of a political party?

d. Do you own any cryptocurrency?

Q2. Which of the following is a parameter?

a. The number of people surveyed in each of the next several Gallup polls

b. The ages recorded in a sample of students taking a statistics class

c. The number of capital cities in Australia

d. The number of people included in unemployment surveys

Q3. A histogram is:

a. A graph with frequencies indicated by equal-width bars

b. A table that shows the relationship between two sets of variables

c. A random distribution of data

d. A document that shows the history of a relationship

Q4. The five key characteristics of data are:

a. Lower limits, upper limits, boundaries, mid-points, and width

b. Centre, frequency, distribution, outliers, and time

c. Class limits, variation, distribution, outliers, and time

d. Centre, variation, distribution, outliers, and time

Q5. A percentage frequency distribution expresses:

a. Each class frequency as an absolute number

b. Each class frequency as a proportion of the total sample

c. Each class frequency as a percentage of the total sample

d. All class frequencies as a percentage of the preceding class frequency

Q6. The term s 2 is notation for:

a. The square of the variance of a sample

b. The square of the standard deviation of a sample - ie, the variance

c. The square of the standard deviation of a population

d. The square of the variance of a population 3

Q7. A z score is:

a. The sum of the data values divided by the number of data values

b. The square of the standard deviation

c. The number of SDs a data value is above or below the mean

d. The mid-point of the data set

Q8. A test statistic is:

a. The relevant parameter value

b. The statistic produced from a survey or experiment

c. The statistic produced from a standardised college examination

d. A standardised score, such as a z score

Q9. The graph of a uniform distribution is shaped like:

a. A square

b. A pyramid

c. A rectangle

d. A bell

Q10. The main characteristics of a normal distribution of data are:

a. All frequencies are the same value - i.e. there are no tails

b. The frequencies increase to a maximum and then level off

c. The frequencies are skewed to the right

d. The distribution of frequencies is symmetrical and the shape resembles that of a bell