Revision 2: OFE QMT2043

If a researcher wants to make generalizations to the total population, the best sampling strategy to utilize would be a snowball sample

• True

• False

The sampling frame for any probability sample is a complete list of all the cases in the population from which your sample will be drawn.

• True

• False

Generalisations about populations from data collected using any probability sample are based on intuition.

• True

• False

A simple linear regression model is an equation that describes the straight-line relationship between a dependent variable and an independent variable

• True

• False

When using simple regression analysis, if there is a strong correlation between the independent and dependent variable, then we can conclude that an increase in the value of the independent variable causes an increase in the value of the dependent variable

• True

• False

In simple regression analysis, if the correlation coefficient is a positive value, then

• The Y intercept must also be a positive value

• The least squares regression equation could either have a positive or a negative slope

• The slope of the regression line must also be positive

• The standard error of estimate can either have a positive or a negative value

Mean scores are helpful in the interpretation of nominal data

• True

• False

Cumulative frequency polygon can be used for the estimation of

• Mean

• Median

• Mode

• Standard Deviation

What data type for cars' speed?

• nominat

• ordinal

• continuous

• discrete

The ages in years of 8 patients who are randomly selected from a certain hospital are 12, 30, 5, 20, 5, 36, 28, 21.

The mean value of the patient's age is

• 125.5

• 78.5

• 19.63

• 157