Statistic and Probability

Which of the following is most likely a parameter opposed to a statistic?

• The proportion of females registered to vote in a country

•    The average height of people randomly selected from a database.

•   The proportion of trucks stopped yesterday that were cited for bad brakes.

• The average score of the first five learners completing an assignment.

Consider the set of data 86, 88, 90, 95, and 98 with a sample size of 3. What is population size N?

• 3

• 5

• 8

• 7

What does the Central Limit Theorem states?

• The more samples are taken, the more centralized the samples will become.

• The more samples are taken, the more a graph will look like a normal distribution.

• The more you run a random experiment, the more results will follow a normal distribution.

• The more you run a random experiment, the more centralized the results will become.

What is the mean of 13, 27, 29, 17, and 24?

• 22

• 13

• 29

• 28

The Grade 10 students took NAT Exam last year. Their mean NAT score is 65 and sixty students were chosen and had the standard deviation of their score is 5. What is the mean of the sample mean?

• 10

• 25

• 65

• 60

Which of the following serves as a guide in deciding whether to reject or accept the null hypothesis?

• acceptance region

• decision rule

• rejection region

• interpretation

What is the z-value which corresponds to the 50th percentile?

• 1.5

• 1.0

• 0.5

• 0

Which of the following is most likely a parameter opposed to a statistic?

• The average score of the first five learners completing an assignment.

•    The proportion of females registered to vote in a country

•     The average height of people randomly selected from a database.

•    The proportion of trucks stopped yesterday that were cited for bad brakes.

What sampling technique is used when the principal selects every 16th student from a numbered list of all 800 students?

• Simple Random Sampling

• Stratified Sampling

• Cluster Sampling

• Systematic Sampling

Given that the alternative hypothesis is μ≠26, what type of tail test should be used?

• right-tailed

• left-tailed

• two-tailed

• cannot be determined