Test 1 Flashcards
To calculate the Sum of squares, you ______ the mean deviation- scores and sum them:
Square
The range indicates the
Distance between the highest and lowest scores
A measurement of 25 inches would have a lower real limit of _____ inches.
24.5
An outlier is
A case that shows a very extreme score relative to other cases
The Variance is the:
A. Sums of squares divided by N And B. The average squared deviation from the mean. Answer- A & B
A ____________ variable can theoretically include an infinite number of values between any two points.
Continuous
____________ is defined as, how far scores deviate, on average, from the mean.
Standard Deviation
A _________ sample accurately reflects the individuals, behaviors, and scores found in the population. To ensure we achieve this, researchers collect their participants through a _____ sample, which means each member of the population, has an equal chance of being included
- Reflective 2. Random
The symbol Σ means to __________________
Sigma; summation
Proportions are another name of the ______ ______.
Relative frequencies
Frequencies and the Measured of Central Tendencies are types of __________ statistics.
Descriptive
The median is the same as the _______.
Midpoint
We use sample statistics to generalize to the __________.
Population
Dr. Qui is studying the influence gender has on the type of car a person drives. Both of these variables are considered a _______ scale of measurement.
Nominal
If the variance of a distribution is 100 the SD is _______________.
10
If the mean for a set scores is 75 and the standard deviation is 5, what can you say about a score of 65?
2 SD below mean
The number of arithmetic problems correctly solved
Ratio
Class standing (I.e one’s rank in the graduating class)
Ordinal
Type of phobia
Nominal
Temperature in (F)
Interval
Annual income in dollars
Ratio
Place in dog show
Ordinal
Heart rate in beats per minute
Ratio
What must you do to the Mean deviation scores when calculating the Sum of squares?
Square them
What are two major disadvantages of the Mode?
- Doesn’t use all the scores 2. There can’t be more than one mode. Not multimodal
What percentage of scores in a normal distribution should be between 1 standard deviation above and 1 standard deviation below the mean?
68%
How do the measures of Variability go beyond the measures of Central Tendency?
Overall distribution and looks at distance of scores
What does the variability in your score tell you about the data?
Consistency of behaviors and accuracy of the mean.
What are three measures of central tendency?
Mean, median, mode
Explain where the three Measures of Central Tendency are located in the Normal distribution and why.
They are all located on the top of the distribution. Mode is at the top because that is the greatest frequency in Normal distribution. Median because that is the midpoint and mean because it is the average.
What must you do to the Mean deviation scores when calculating the Sum of Squares?
Square them.
Explain the difference between an interval scale of measurement and a ratio scale?
Interval can show the below or above average and Ratio scale does not have any negatives.
What type of scale is being used for each of the following measurements? B. The number of arthritic problems being solved correctly
Ratio
What type of scale is being used for each of the following measurements? C. Type of phobia
Nominal
What type of scale is being used for each of the following measurements? D. Temperature in (F)
Interval
What type of scale is being used for each of the following measurements? E. Annual income in dollars
Ratio
What type of scale is being used for each of the following measurements? F. Place in a dog show
Ordinal
What type of scale is being used for each of the following measurements? G. Heart rate in beats per minute
Ratio
