Definitions
In this type of distribution, the mean, median, and mode are all equal.
What is a normal distribution?
This is found by adding all the values together and dividing by the number of values.
What is the mean?
This type of data represents categories without any order.
What is ordinal data?
Round 6.472 to the nearest tenth.
What is 6.5?
What is systematic sampling?
In a right-skewed distribution, the tail extends in this direction.
What is to the right?
The middle value when data are ordered.
What is the median?
This type of data has no true zero.
What is ratio data?
Round 8.134 to the nearest hundredth.
What is 8.13?
Find the mean, median, and mode (in this order) of the following data set: 2, 6, 17, 2, 13, 2, 18, 20, 2, 14, 5, 9, 3.
What is 8.7, 6, and 2?
What are standard deviations?
The value that occurs the most frequently.
What is the mode?
This type of data can be most easily explained by temperature in Celsius.
What is interval data?
What is 0.057?
An exam has a mean score of 75, with the standard deviation being 10. Find the z-score of a student who scored 95 on the exam.
If a z-score is negative, the value lies in this direction from the mean.
What is below the mean?
Used when a dataset has a large outlier.
This type of data has a natural ranking but differences between values are insignificant.
What is ordinal data?
Round 4.4446 to the nearest hundredth.
What is 4.44?
68% of people fell within one standard deviation of the mean. Find how many people are in this 68% if 400 people were observed.
What is 272 people?
This measures how spread out data are around the mean.
What is standard deviation?
This measure of center would increase by 5 if all values in a dataset were to also increase by 5.
What is the mean?
Height, weight, and age.
What is ratio data?
Round 27.995 to the nearest tenth.
What is 28.0?
95% of data in a standard distribution falls within 2 standard deviations of the mean. In a dataset of 1,000 people, find the amount of people that fall outside of two standard deviations.
What is 50 people?