RECAP - FINALS -QM

Question 1

When you calculate the MOE for the average number of pictures you take daily you need the...

Accepted Answer

MOE for a mean

Question 2

Which of the following is/are NOT affected by outliers?

Accepted Answer

Mode, Median

Question 3

When do you know if you should reject the claim?

Accepted Answer

When the p-value is smaller than 0,05

Question 4

Which of the following is WRONG about the normal distribution?

Accepted Answer

Most of the data stand far from the mean

Question 5

In the correlation formula what does the n mean?

Accepted Answer

Number of pairs of data in your sample

Question 6

If you take 10 samples of 50 values from this population, your sampling distribution will...

Accepted Answer

have a bell shaped curve

Question 7

What is a uniform distribution?

Accepted Answer

A distribution where all the values are the exact same, A distribution where the values have the same frequency, A distribution where the mean and the median are the same

Question 8

What is the first step to calculate the margin of error?

Accepted Answer

Determine if you need the formula for a proportion or a mean

Question 9

How would you describe this correlation?

Accepted Answer

Strong negative correlation

Question 10

Which distribution has the smallest standard deviation?

Accepted Answer

red line

Question 11

Which of the following is/are true about Z-scores?

Accepted Answer

It makes comparison between values of different scale easier, It measures how many stand. deviation you are from the mean

Question 12

What does the correlation coefficient (r) tell you?

Accepted Answer

The strenght of the correlation, The direction of the correlation

Question 13

What is a weighted mean?

Accepted Answer

A mean in which some values contribute more than others, A mean calculated with the formula : ∑XW / ∑w

Question 14

How can you calculate the MOE if you don't have the sample size (n)?

Accepted Answer

Assume we have more than 30 values and use a z-value (z*)

Question 15

In the binomial formula, what do the letters n x in the parenthesis mean?

Accepted Answer

The total number of possible outcomes

Question 16

What does the margin of error calculate?

Accepted Answer

how close the sample statistics are to the actual population

Question 17

Which of the following is/are TRUE about the standard error?

Accepted Answer

The higher the standard error, the more spread out your data, It tells us how much do means of means vary between samples

Question 18

A dietitian claims that 25% of people are vegetarian but you believe it is rather 35%.

Accepted Answer

Ho: p = 0,25 Ha: p > 0,25

RECAP - FINALS -QM

Questions 18

RECAP - FINALS -QM

Questions 18