Knowledge quiz

It's time to put what you've learned to the test, get 8 right to pass this week.

Which of the following statements regarding descriptive analysis are true?

There are two correct answers.

It includes basic statistics such as the minimum and maximum values.

It helps you to simplify and summarize data.

It uses statistical tests to analyze whether a pattern in the data is due to chance.

It uses predictive techniques and hypothesis testing.

A company undertakes a survey of its employees' skill development. Which group can the findings from the survey be generalized to?

Choose the correct answer.

All employees in the industry

All employees in that company

All unskilled workers in the industry

All graduate-level employees

Which of the following is a measure of dispersion?

Choose the correct answer.

Range

Quartile

Mode

Median

What is the term given to the practice of choosing and presenting only the most beneficial or profitable results of a survey?

Choose the correct answer.

Data fishing

Data snooping

Biased sampling

Cherry picking

Which types of tests would you generally use if the numerical data has a non-normal distribution?

There are two correct answers.

Nonparametric

Parametric

Distribution-free

Qualitative

Which of the following statements concerning bias are true?

There are two correct answers.

Bias can be introduced at the stage of data collection, with surveys and questionnaires.

Cognitive bias is inbuilt into us as humans and how we think.

One way to remove bias is to use voluntary response samples.

Overfitting a model will help to remove bias.

What is the probability of selecting a red card from a pack of 52 cards?

Choose the correct answer.

0.50

1.00

0.00

0.25

Which of the following is an example of a loaded question?

Choose the correct answer.

What is your view of the current taxation system for people claiming welfare?

Given the rising costs to the middle class, do you support increasing welfare payments?

Do you think that the welfare system is fair?

How can the taxation system be improved for people claiming welfare?

Which of the following are characteristics of a normal curve?

There are two correct answers.

Most of the data is clustered around one number or value.

There are always two or more significant peaks in the curve.

Only non-parametric statistical tests are appropriate.

It looks like a "bell curve".

10.

Which of the following statements regarding inferential analysis are true?

There are two correct answers.

It informs you about the basic qualities of the data.

It describes and visualizes the data.

It is used to make predictions.

It is used for hypothesis testing.