Statistics and Probability

It is a numerical quantity that is assigned to the outcome of an experiment.

• Statistics

• Probability

• Random Variable

• Distribution

It is the set of all possible outcomes in an experiment.

• Random Variable

• Sample Space

• Mean

• Data

Which of the following are the properties of a Normal Probability Distribution.

• The distribution curve is bell - shaped.

• The curve is symmetric about its center, the mean.

• The mean, the median, and the mode coincide at the center.

• The area under the curve is 1 or 100%

• The tails of the curve is asymptotic to the base line.

TRUE or FALSE: The standard normal distribution of a random variable is a normal distribution with a mean of 0 and a standard deviation of 1.

• TRUE

• FALSE

It is a number which describes the spread of the distribution.

(a)  

Brianna flips a coin then rolls a number cube. These events are

• independent

• dependent

• both independent and dependent

• none of the above

• 12

• 128

• 12.8

• 10

A box plot has been drawn to show the heights of some petunia seedlings, in centimetres. Find the interquartile range.

• 6

• 11

• 7

• 8

• 0.37

• 0

• 0.78

• 0.25

If the correlation coefficient r = 0.98 then it refers to a ... correlation

• very strong

• weak

• moderate

• strong