Exam 22: Using Statistics to Describe Variables

There is a data set A: 3, 3, 3, 5, 6, 6, 8, 9, 9, 12, 13. The data set B is created. It is identical to A, except for its much larger last value.Data set B: 3, 3, 3, 5, 6, 6, 8, 9, 9, 12, 83. What is the effect of increasing the largest value upon the descriptive statistics of the data set?

The data set is: 2, 3, 6, 7, 12. A measure of dispersion is calculated, and it is about 3.5. What is this measure of dispersion?

Twenty student nurses take the NCLEX examination. If the average of the 20 scores is known, how many degrees of freedom are there in the sample?

The median is represented by which score for the following data set? Data set: 1, 2, 4, 7, 7, 8, 10, 10, 10, 18

Which measure is the most helpful both for providing a quantification of dispersion and for providing a way to interpret how far away from the mean each individual score is?

A researcher wants to select a way to measure how values in a research study are dispersed around the mean, and how homogeneous or heterogeneous they are, for a ratio-level variable. The researcher might select which of the following?

The confidence interval for 5-year survival after Stage I breast cancer, in a large sample of women living in Texas, is 87.5% to 93.3%, at a p < 0.05 level of significance. What does this mean?

The data set is as follows: Ford, Ford, Chevy, Toyota, Ford, Ford, Chevy, Dodge, Dodge, Dodge, Ford, Subaru, Chevy, Toyota, Chevy. What measure of central tendency and dispersion will be used with this set?

Female baccalaureate nursing students scored an average of 89% on the first midterm examination. Male baccalaureate nursing students also scored an average of 89% on the first midterm examination. What does this mean?

Descriptive statistics are found in which of the following?

The Stanford Binet Intelligence Quotient is a normed intelligence test, and its IQ measures are quite normally distributed. Its standard deviation is 16. If the test were perfectly normal in its distribution, this would mean which of the following?

Which measure is merely a simple difference score?