Grade 11 and 12 Mathematics (Moderator: geoffrey)

What is the appropriate chi-square test to assess if the distribution of swelling status is the same ...

Started by luvbio

What are the degrees of freedom for performing this chi-square test? 1.2 2.3 ...

Started by Mr3Hunna

A simple random sample of size n is by definition a sample that is selected in a manner to guarantee ...

Started by luvbio

Blocking is used to filter out the effects of some extraneous factors. Indicate whether the ...

Started by tsand2

Selection bias occurs if volunteers only are used in a study. Indicate whether the statement ...

Started by crobinson2013

Increasing sample size will eliminate bias in a sample. Indicate whether the statement is true ...

Started by Alainaaa8

A study is an observational study if the investigator observes the behavior of a response variable ...

Started by jho37

If the sample size is small relative to the population, there is little practical difference in the ...

Started by erika

Factors are extraneous if their effects on the response variable cannot be distinguished from one ...

Started by genevieve1028

The method of control wherein an extraneous variable is held constant is called blocking. ...

Started by Mr. Wonderful

A control group provides a baseline for comparison with a treatment group. Indicate whether ...

Started by kfurse

If the subjects as well as the person measuring the response are aware of the treatment assigned to ...

Started by Mimi

An outlier is a data value that is unusually far from the rest of the values in a data set. ...

Started by ap345

The density (rectangle height) of a class is calculated by multiplying the relative frequency of the ...

Started by kfurse

For stem and leaf plots with single-digit leaves, commas are used to separate the leaves. ...

Started by karateprodigy

If the upper tail of a distribution stretches out farther than the lower tail, the distribution is ...

Started by erika

A segmented bar chart uses rectangles rather than circles to display different categories in a set ...

Started by bobbysung

A time series plot is a graph of data that has been gathered at different points in time. ...

Started by TFauchery

The mean is the middle value of an ordered data set. Indicate whether the statement is true or ...

Started by mynx

The variance is the positive square root of the standard deviation. Indicate whether the ...

Started by robinn137

By definition, an outlier is extreme if it is more than 3.0 iqr away from the closest quartile. ...

Started by soccerdreamer_17

When using a 20 trimmed mean, the largest 10 and the smallest 10 of the observations are discarded ...

Started by cabate

The interquartile range is resistant to the effect of outliers. Indicate whether the statement ...

Started by lindiwe

Pearson's correlation coefficient, r, does not depend on the units of measurement of the two ...

Started by kwoodring

If r is close to 1, then the points lie close to a straight line with a positive slope. ...

Started by magmichele12