Behavioral Science Quiz 3

u = 60 and o = 5

A population has u = 50 and 0 = 5. If 10 points are added to every score in the population, what are the new values for the mean and standard devation.

o = 1

On an exam with a mean of u = 70, you have a score of X = 75. Which of the following values for the standard deviation would give you the highest position within the class?

1.5

What is the VARIANCE for the following population of scores? Scores: 5, 2, 5, 4

If the sample statistic is EQUAL to the corresponding population parameter, then the statistic is unbiased

A researcher takes a sample from a population and computes a statistic for the sample. Which of the following statements is correct?

2

A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

s2 = 10; o2; = 9

A set of 10 scores has SS = 90. If the scores are a sample, the sample variance is ___, and if the scores are a population, the population variance is ____.

M1 = 36, M2 = 40, and both variances = 6

One sample is selected to represent scores in treatment 1 and a second sample is used to represent scores in treatment 2. Which set of sample statistics would present the clearest picture of a real difference between the two treatments?

27

What is the value of SS (sum of squared dev.) for the following sample? Sample: 1, 1, 1, 7

12

What is the value of SS (sum of squared deviations) for the following population? Population: 1, 1, 1, 5

9

What is the value of SS for the following set of scores? Scores 1,1, 4, 0

The distance from one score to another tends to INCREASE, and a single score tends to provide a LESS accurate representation of the entire distribution

Which of the following is a consequance of increasing variability?

o

Which of the following symbols identifies the population of scores? Scores 5, 2, 5, 4