Review knowledge

Statistical enquiry means

• Search for knowledge

• Search for knowledge with the help of statistical methods

• It is science for knowledge

• Collection of anything

What is the main purpose for asking statistical questions?

• We can create charts with statistics

• Surveying people is fun

• Statistical questions help us gather data about a topic

When finding the median then you end up with a middle that has two numbers, what do you do?

• Take the lower number

• Take the average of the two numbers

• Take the higher number

• Take both number

What is the range of the data?

• The difference between the highest and lowest values of the data

• Find the middle value

• Find the most common value

• Add up all the values in the data then divide by number of values in data

Find the range of the data

• 108

• 36.5

• 77

• 2

What proportion of the population's data do we expect to lie within 2 standar deviations of the mean?

• 99.7%

• 90%

• 68%

• 95%

How do we calculate the standard deviation of a dataset?

• Square the dataset's deviance from the mean

• Square root the dataset's deviance from the mean

• Square root the dataset's variance

• Square the dataset's variance

Why do we randomly select our samples?

• It is easier to do

• Reduce bias

• So we don't get the same answers from everyone

• To control every aspect

A______ is a small portion of the population used to gather data from

• Sample

• Population

• Bias

• Systematics sampling method

Collection of data includes

• Method of collectiong data

• Regeneration of data from actual one

• Collectiong valuable data from vareity of sources using suitable method of collection

• Only collecting of information