Descriptive and Inference Statistics

Front

In a(n) ____________________ study, researchers observe and measure variables without manipulating any factors.

Back

observational

Front

You have a mean of 56 and a standard deviation of 4.3. What is +2 standard deviations from the mean?

Back

64.6

Front

The mean weight of Sumo wrestlers is 330 pounds with a standard deviation of 40 pounds. The mean weight of soccer players is 142 pounds with a standard deviation of 5.2 pounds. A particular Sumo wrestler weighs 360 pounds and a particular Soccer player weighs 153.6 pounds. Who weighs more, relatively speaking? (Who has a higher z score?)

Back

Soccer player

Front

Population or Sample? The average weight of every person entering the mall within 3 hour period was 146 lb.

Back

Population

Front

A(n) ____________________ involves manipulating one or more variables to determine their effect on a dependent variable.

Back

experiment

Front

What is the definition of descriptive statistics?

Back

Descriptive statistics summarize and describe the characteristics of a data set.

Front

What is the purpose of inferential statistics?

Back

Inferential statistics allow us to make predictions or inferences about a population based on a sample.

Front

Define 'mean' in statistics.

Back

The mean is the average of a set of numbers, calculated by dividing the sum of all values by the number of values.

Front

What is a standard deviation?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.

Front

What is a z-score?

Back

A z-score indicates how many standard deviations an element is from the mean.