Intro to Graphing and Statistics

A young student wants to measure the percent time a dog spends sleeping, playing, and eating over the course of one day.  What type of graph should this student make once all of the data is collected?

• pie/circle
• bar
• line
• scatter plot

Sandy wants to determine which depth of water produces the biggest flowers.  Which graph would best display her data?

• Bar Graph
• Line Graph
• Pie Graph

What would the INDEPENDENT variable be in an experiment testing which paper airplane design goes the furthest when thrown?

• the paper used

• the paper airplane design

• the distance of each plane's flight

• how hard the plane is thrown

What would the DEPENDENT variable be in an experiment testing which paper airplane design goes the furthest when thrown?

• the paper used

• the paper airplane design

• the distance of each plane's flight

• how hard the plane is thrown

What would the CONTROL variable be in an experiment testing which paper airplane design goes the furthest when thrown?

• the paper used

• the paper airplane design

• the distance of each plane's flight

• how time it takes to lang

To create an appropriately labeled graph to illustrate the sample means of the three populations to within 95% confidence (i.e. sample mean +/- 2 SEM). What type of graph would you create?

• Line

• Bar

• Box and Whiskers

• Pie

Which significance level  
(column) do you look at when finding the critical value?

• .50
• .10
• .05
• .01

How do you find critical value?

• where degrees of freedom lines up with significance level
• where significance level lines up with chi-square
• the difference between total and chi-square 
• degrees of freedom minus significance level

What is the purpose of a Chi-Square test?

• To determine if there is a significant difference between the observed and expected values in an experiment.

• To determine if there is a statistically significant difference between the observed and expected values in an experiment.

• To do extra math.

• To conclusively prove that your null hypothesis is true or false.

Observed in the wild are 10 circles, 20 squares and 30 triangles. The ratio for this particular population is 2:3:5

observed: 10 circles expected: 12

observed 20 squares expected : 18

observed 30 triangles expected: 30

How many degrees of freedom are there in this experiment?

• 1

• 2

• 3

• 4