Distributions
Of the 2 types of data, dotplots, stemplots, and histograms are examples of this type of data.
What is Quantitative data?
1-Var Stats
What is One-Variable Statistics?
Minimum, Quartile 1, Median, Quartile 3 and Maximum.
What is use 1-Var Stats to find the 5-Number Summary?
The Far Outlier Rule.
What is Q1-1.5IQR and
Q3+1.5IQR?
A relative frequency.
What is a percent / percentage?
To explore the relationship between one variable on condition of another, fix the value of the variable of interest and produce this distribution of the related data.
What is a conditional distribution?
GSOCS for describing quantitative data distributions.
What is Gap, Shape, Outliers, Center and Spread?
Typical, unusual, surprising and unexpected are key words to find this statistic.
What is a z-score (formula)?
This simple formula expresses the relationship of Variance to Standard Deviation.
What is the square root of variance = standard deviation?
A review of voter registration yields the following.
| Male | Female | Total
Democrat 300 600 | 900
Republican 500 300 | 800
Total 800 900 | 1700
The proportion of registered male Republicans.
What is 0.29? (or 29.4%)
For an earth science course, recent points on an exam are given in the stemplot.
This answer is the relationship of the mean to the median.
5 | 2
6 | 6 8
7 | 1 4 8
8 |2
9 |
10|0
What is Mean > Median?
FSD for scatterplots.
What is Form, Strength and Direction?
Given N(55,4.5), this tells you what percent of scores fall between 50 and 60.
What is normalcdf on the calculator?
This is the generic way to write a least squares regression equation.
What is y-hat = a +bx? , in natural units
The effect of altering the data by a constant that changes its' distribution shape, center and variability (spread).
What is scaling? (Multiplying and Dividing)
In Normal distributions, approximately this percentage of the observations will fall within 1.5 deviations from the mean.
What is 81.5%? or What is 68% + 13.5%?
The Empirical Rule.
What is 68-95-99.7% for Normal distributions?
To describe the location of an individual within a Normal distribution by determining its percentile, use this.
What is invNorm on the calculator?
This is the result of solving the z-score formula for x, the actual value.
What is x=mean+z(std dev)?
The correct interpretation of the slope of this regression line:
Predicted number of eggs(thousands)=-142.74+39.250 Fish length(cm)
What is, 'As fish length increases by 1 cm, the predicted number of eggs increases by 39,250'?
The mean age at inauguration of all U.S. Presidents is 54.6, and is approximately N. Obama was 47 which is the 11th percentile. George Washington was 57. This is his percentile.
What is 65.17%?
For bivariate data, LSRL and SSE.
What is Least Squares Regression Line and Sum of Squared Errors?
Given bivariate data, these ordered steps are necessary to determine the % of variation in y that is due to the linear relationship between y and x.
What is Enter the data in lists, Run LinReg, then Find R2 ?
Standard Deviation.
What is \show me
Given the actual consumption of natural gas is 702 ft3 when the temperature is 34 degrees Fahrenheit, this is the model's residual.
Predicted gas consumption(cubic ft)=1344-19Temp(Fahrenheit)
What is 702-698= 4 ft3 a positive residual?