Statistics Review Flashcards

These flashcards cover key concepts and questions related to statistics, including percentiles, deciles, cumulative frequency, and data interpretation.

What is the value of N based on the frequency distribution table?

45

What is the class size in the distribution based on the provided table?

6

What cumulative frequency is used to solve for the 45th percentile?

36

What is a decile in statistics?

A measure that divides a dataset into ten equal parts, each containing 10% of the data.

What is the value of the 3rd decile?

15.8

Which class interval contains the highest frequency?

12 – 17

In which class interval is the upper quartile located?

18 – 23

What is the value of the lower boundary used in determining the third quartile?

24.5

What do percentile ranks indicate?

How a student's results compare to their peers.

What can be concluded when two students have the same percentile rank?

Both students performed equally well in relation to their peers.

If an employee is in the 85th percentile, what does it mean about their performance?

Their performance is better than 85% of the employees.

What does a percentile rank of 50 represent?

The median score, meaning the student performed better than 50% of participants.

What does a score in the 80th percentile mean for Jack?

80% of the examinees scored equal to or lower than Jack’s score.

What does it mean if Andrei's weight is in the 7th decile?

Andrei weighs more than 70% of Grade 8 learners.

Which statement is always TRUE regarding percentiles?

50th percentile is equivalent to the mean of the scores of the examinees.

What can be inferred from Geraldine scoring one of the highest on a test?

Her percentile score is numerically higher than her score in the test.

What is the 70th percentile of the online streaming data?

12

What is the interquartile range (IQR) of the travel times for students?

40

What does the 80th percentile of the rainfall data tell the city?

80% of the days had rainfall less than or equal to 10mm.

What does the 65th percentile of the test scores (87) indicate?

65% of the students scored less than or equal to 87.

What does the median number of passes (45) completed tell the coach about team performance?

Half the players completed more than 45 passes, and half completed fewer.