Levels of Measurements
A variable that is non-numeric and categorical; An example = jersey numbers
What is a nominal variable?
The three main types of measures of central tendency we look at in this class
What are mean, median, and mode?
The sum of all frequencies
What is N?
Q3 - Q1
What is IQR?
The first step in completing a hypothesis test
What is stating Ho and Ha?
Type of data that can be further categorized as discrete or continuous
What is quantitative data?
The shape of this type of distribution (on a graph) is normally referred to as a bell-curve
What is a normal distribution?
The names of the 6 columns (vertical) in a frequency table
What is category, frequency, proportion, percentage, cumulative frequency, and cumulative percentage?
What is the five number summary?
What is the alternate hypothesis?
A variable that is numeric, but cannot be negative (there is an absolute zero)
What is a ratio variable?
Data values that skew the distribution further left or right
What are outliers?
True/False: In a frequency table, you can find the mean using the cumulative frequency column but not the cumulative percentage column
What is false?
Σ(X1 -- x̄)^2/N -1
What is variance/ What is the formula for variance?
The sample is randomly selected, the variable is scale, the mean score for the population is known, and the data is normally distributed
What are the assumptions in a hypothesis test?
Label the following examples: pH of soil (ex: 3.5)
type of crop grown (ex: 1 = corn)
amount of stubble grown on plants (ex: 1 = light, 2=medium)
date of final harvesting (ex: November 12, 2018)
What is interval, nominal, ordinal, interval?
True or False: Skewness refers to a lack of symmetry or balance in a frequency distribution and Kurtosis indicates whether the peak of the distribution is taller or flatter than the ideal normal curve, and also whether the tails are shorter or longer than the normal curve
What is true?
X - F --> Find the mean
17 - 15
18 - 17
19 - 24
20 - 30
21 - 31
What is 19.38?
IQR(1.5) + Q3
What is the formula for finding the upper limit whisker in a modified box plot?
The p-value rule we must follow when trying to prove Ha
What is if p-value < alpha, we reject Ho and if p-value > alpha, we fail to reject Ho
Individuals with red cars are more likely to get into car accidents compared to people with black cars; the independent variable is
What is the color of the car?
Find the mean, median, and mode
0, 1, 2, 3, 3, 4, 4, 4, 5, 18, 19, 20
What is mean = 6.92 , median = 4, mode = 4?
The steps to creating a frequency table; assume you were given X and F columns; be specific
What is find N, use f/N to fill out the proportion column, use f/N to fill out the % column, count the frequencies to fill out the CF column, and add all the % to fill out the C% column
Total deviance always equals
What is zero?
The steps to completing a hypothesis test using SPSS; The exact buttons we push in SPSS (analyze > descriptive stats etc)
What is analyze, descriptive statistics, explore, putting your variable in your dependent list, select normality plots with tests, continue and okay, then analyze, compare means, one sample test, select the variable you want to test and enter your population mean into the test value box, okay