PSYC 354 Quiz 2: Central Tendency
- A researcher records the list of finishes (e.g., 1st, 2nd, 3rd, 4th) for a track team throughout their season. The mean is the best measure of central tendency to report in this circumstance to describe the most typical finish for this track team.
- The value of X = 9 in the distribution below is the _____.
- A sample has a mean of M = 50. If one new person is added to this sample, what effect will this have on the sample mean?
- A sample of scores has a mean of M = 20, a median of 28, and a mode of 29. What is the most likely shape for the sample distribution?
- Skewed distributions, open-ended distributions, or discrete variables are situations for which the mean cannot be calculated or for which the mean may not be the best measure of central tendency to utilize.
- For any distribution of sample scores, at least one individual will have a score exactly equal to the mode.
- A researcher assesses eye color for a sample of n = 50 people. Which measure of central tendency would be appropriate to summarize the measurements of eye color collected for this sample?
- Which statement below must be false regarding a distribution of scores?
- Consider a 100-point college exam for which there is a large number of students that perform extremely well, as well as a large number of students that perform extremely poorly. Which statement below is true?
- A sample of n = 8 scores has a mean of M = 16. For this sample, ΣX = 128.
- What is the value of the median for the following set of scores? Scores: 1, 4, 6, 7, 9, 15, 15, 16, 25, 30
- What is the mean for the following sample of scores? Scores: 2, 4, 5, 9
- A student takes a 10-point quiz each week in statistics class. If the student’s quiz scores for the first three weeks are 10, 8, and 8, then the mean score
is M = 9. - What is the median for the population of scores presented in the frequency distribution table below?
- What is the mode for the population of scores shown in the frequency distribution table?