Crunching the Numbers: Using Statcrunch in Statistics

Keisha Brown

Perimeter College at Georgia State University

Textbook: Fundamentals of Statistics, 4th ed., by Sullivan, Prentice Hall (Pearson), 2014

Channel: FavMathTeacher

Topics / Steps in Statcrunch / Examples to Try
Random Number Generation / Applets > Random Numbers / Select a random sample of 10 schools.
Frequency Distributions / For Qualitative or Discrete Data:
Stat > Tables > Frequency
For Continuous Data:
Data > Bin
Stat > Tables > Frequency > Select Bin(Graduation Rate) / Create a frequency distribution of States. *Make sure to “Store in data table” at under Output.*
Create a frequency distribution of Graduation Rate with a lower class limit of 0 and a class width of 40.
Measures of Central Tendency, Measures of Dispersion, Quartiles, IQR / Stat > Summary Stats > Columns / Find the descriptive statistics for Graduation Rate.
Find the mean Graduation Rate by state. (Group by State)
Bar Chart / Graph > Bar Plot / Create a bar chart of States.
Histogram / Graph > Histogram / Create a histogram of Poverty.
Stem and Leaf Plot / Graph > Stem and Leaf / Create stem and leaf plot of College Readiness.
Box Plot / Graph > Boxplot / Create a box plot of Poverty.
Pie Chart / Graph > Pie Chart / Create a pie chart of States.
Dot Plot / Graph > Dotplot / Create a dot plot of College Readiness.
Time-Series Graph / Graph > Index/Time Plot / pg. 98 Section 2.2 #57
Column: var2 ; X axis format: Custom Labels in: Federal Debt
Map / Graph > Map > US States / Using the new columns created from your frequency distribution of states, superimpose these values on a map.
Normal Probability Plot / Graph > QQ Plot / Could the variable of Poverty have come from a population that is normally distributed?
Least-Squares Regression Line, r and R2, Residual Plots, Predictions, Hypothesis Testing for intercepts and slopes, Confidence intervals / Stat > Regression > Simple Linear / Regardless of whether a linear relationship exists, create a least-squares regression line relating Poverty(x) and College Readiness(y).
Regression by Eye / Applets > Regression > By Eye
Scatter Plot / Graph > Scatter Plot / Create a scatter plot of Poverty (x) and Graduation Rate (y).
Topics / Steps in Statcrunch / Examples to Try
Probability of Uniform Distributions / Stat > Calculators > Uniform / The reaction time X (in minutes) of a certain chemical process follows a uniform probability distribution with 5 ≤ X ≤ 10. Find the probability that the reaction time is between 6 and 8 minutes; less than 6 minutes.
Probability of Binomial Distributions / Stat > Calculators > Binomial / n=10, p = 0.4,
Find the probability of x = 3; x > 3; and x ≤ 3 successes.
Probability of Normal Distributions and Critical Values / Stat > Calculators >Normal / µ = 50, σ = 7
Compute the P(X > 35); P(40 < X < 65).
Determine the 17th percentile.
Probability of Student’s t-Distribution and Critical Values / Stat > Calculators > T / Determine the critical value for a left-tailed test of a population mean at the α = 0.05 level of significance based on a sample size of n = 13.
Sampling Distributions / Applets > Sampling Distributions
one sample mean test (σ unknown) or confidence interval / Stat > T Stats > One Sample / pg. 455 10.3 #14
one sample proportion test and confidence interval / Stat > Proportion Stats > One Sample / pg. 446 10.2 #23
two sample independent mean test / Stat > T Stats > Two Sample / pg. 500 11.3 #7
two sample dependent mean test / Stat > T Stats > Paired / pg. 490 11.2 #9
two sample independent proportion test / Stat > Proportion Stats > Two Sample / pg. 480 11.1 #25
χ2 - GOF / Stat > Goodness-of-fit > Chi-Square Test / pg. 523 12.1 #11

Simulations of Distributions

Word Walls

Resampling

Students can complete surveys through Statcrunch

Correlation by Eye

Search Functions

And Much More!!