1. Consider the data in the numeric vector

x <- c(83, 84, 24, 69, 74, 13, 66, 97, 45, 64).

Executing quantile(x) gives the output

## 0%25% 50% 75%100%

## 13.00 49.75 67.50 80.75 97.00

What does the value of 67.50 represents?

The mean of the data

The 25th percentile of the data

The standard deviation of the data

The median of the data

The 75th percentile of the data

2. Consider the original EPIDURAL DATA in PASWR2 package. One observation has missing `oc` value. The doctor who performed the procedure at the time is:

Doctor A

Doctor B

Doctor C

Doctor D

3. If we use the date EPIDURAL data from exercise 1 (this is after we dropped an observation with NA entry, the value of

EPIDURAL$kg[3] is:

3

86

72

63

4. In R the function `plot(x, y)` produces a scatterplot, for two numeric variables, x and y?

True

False

5. R function to make a quantile-quantile plot is `qqplot(x, y)`?

True

False