Statistical Inference

Which two are examples of descriptive statistics?

• Median and correlation.

• Mean and standard deviation.

• Hypothesis testing and histograms.

• Variance and regression analysis.

In statistics, a sample:

• Can be used for inferences but not for predictions.

• Is another word for population.

• Is a set of data taken from the population to represent the population.

• Is only used in descriptive statistics.

What is statistical estimation?

• Methods for rounding answers in statistical calculations.

• Methods to determine the best graph to represent statistical data.

• Methods for reducing errors in inferential statistics.

• Methods for reducing errors in descriptive statistics.

How do descriptive and inferential statistics differ?

• Descriptive statistics are more computationally sophisticated than inferential statistics.

• Inferential statistics are more computationally sophisticated than descriptive statistics

• Descriptive statistics only attempt to describe data, while inferential statistics attempt to make predictions based on data.

• Inferential statistics only attempt to describe data, while descriptive statistics attempt to make predictions based on data.

What are two examples of inferential statistics?

• Range and percentiles.

• Mean and probability distributions.

• Regression analysis and hypothesis testing.

• Variance and correlation.

A prediction has been made that the chance that a person will be robbed in a certain city is 15%.

• Inferential

• Descriptive

Tell if the statement if Descriptive or Inferential

A recent survey of 2000 adults having an MBA reported that the average salary is more than $65,000 a year.

• Inferential

• Descriptive

Tell if the statement if Descriptive or Inferential

The chances of you getting a new car is about the same as passing your statistics class.

• Descriptive

• Inferential

Tell if the statement if Descriptive or Inferential

The Senior Citizens that live in Pekanbaru have better memories than the ones that live in Padang.

• Inferential

• Descriptive

Between a Population and Sample: which size is bigger ?

• Population

• Sample

• Both can be the same

• Not enough information