### Problem 6 RStudio code A certain medication is known to increase the pulse rate of its users. The standard deviation of the pulse rate is known to be 5 beats per minute. A sample of 30 users had an average pulse rate of 104 beats per minute. Find the 99 % confidence interval of the true mean.

```{r} #Insert R code below this line

```

### Problem 7 Ten randomly selected automobiles were stopped, and the tread depth of the right front tire was measured. The mean was 0.32 inch, and the standard deviation was 0.08 inch. Find the 95 % confidence interval on the mean depth. Assume that the variable is approximately normally distributed.

```{r} #Insert R code below this line

```