Stats exam #2

A distribution with a positive skew has tilt to the left. T\F

False

In the histogram the columns are bars do not touch other. T/F

False

It a bar graph the columns do touch each other. T/F

False

The meet is often called the middle score in a distribution. T/F

False

The approximate 95% rule says that approximately 95% of the scores in a normal distribution live between _____ Standard deviation units on each side of the mean.

2

The standard deviation is a measure of how much scores vary from the _____ of the score

Mean

A disadvantage of the mean is that it can be influenced by extreme scores in skewed distributions. T/F

True

Hey hysterogram is a figure that shows the frequencies of a quantitative variable. T/F

True

I'll bargraph is a figure that shows frequencies of a qualitative variable. T\F

True

The mean is considered a measure of central tendency. T/F

True

The median is considered to be relatively insensitive to extreme measures. T/F

True

The range is not an appropriate measure to use for distribution with outliers. T/F

True

The standard deviation with the signed to describe the variability of scores in a normal distribution. T/F

True

The theoretical normal curve is symmetrical. T/F

True

Variability refers to how much the scores vary from one another. T/F

True