Statistics and Probability Quiz

What refers to an intelligent guess about a population proportion?

• Hypothesis

• Test statistic

• Decision

• Interpretation

Which of the following can be rejected by a statistical test?

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What do you call a number that describes a population characteristic?

• sample statistic

• parameter

• variable

• decimal

Rejection of the null hypothesis is a conclusive proof that the alternative hypothesis is?

• True

• False

• Either

• Neither

What variables that are being predicted or explained?

• Independent variables

• Dependent variables

• Controlled variables

• Moderator variables

Which of the following is a discrete random variable?

• The weight of Grade 11 students

• The number of patients in a hospital

• The amount of patients in a hospital

• The amount of paint used in repainting a building

If a sample size is 30, which can be used to test a hypothesis about the mean?

• t-test

• z-test

• Either of the two

• Neither of the two

Which of the following is not commonly referred to as a measure of central tendency for the normal distribution?

• mean

• median

• midrange

• mode

What do you call a continuous, symmetric, and bell-shaped distribution of a variable?

• graph

• pie chart 

• line graph

• normal curve

What is the graphical representation of bivariate data?

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