Biostatistics Tutorial Week 4

Biostatistics Tutorial Week 4

University

6 Qs

quiz-placeholder

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Biostatistics Tutorial Week 4

Biostatistics Tutorial Week 4

Assessment

Quiz

Science

University

Practice Problem

Hard

Created by

Yufan Chen

Used 13+ times

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is true about sampling from a population?

Researchers prefer convenient sampling over random sampling as the latter is more time-consuming

We cannot obtain the real/true population parameters

We use population parameters to infer sample characteristics

Population mean is represented by the Greek letter π

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is NOT true about the standard error of the mean:

The larger the sample size, the smaller the standard error

The larger the sample size, the larger the standard error

The larger the sample size, the more confident we are that our estimated mean is closer the true population mean  

The standard error of the mean can be calculated using z x 1.96

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is true about the sampling distribution?

If we draw 100 different samples from the same population, the means would be the same

Researchers often re-sample the same population multiple times in order to achieve the most reliable estimates

Theoretically, the mean of the sampling distribution will be exactly the same as the population mean

Theoretically, the mean of the sampling distribution will unlikely be the same as the population mean

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should we NOT do if we want to reduce sampling variability?

Reduce the sample size

Use random sampling

Use a larger sample

Use better measurement tools like standardised questionnaires

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Why does larger sample size lead to a smaller standard error of the mean?

It's more difficult to capture each participants' characteristics in a larger sample

Larger samples provide more information about the population

We are more confident with obtaining detailed information with a smaller sample

Trick question, larger sample size doesn't lead to smaller SEM

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You need the mean, sd, and n to calculate standard error of the mean, but you only need the proportion and n to calculate standard error for a proportion

TRUE

FALSE

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