# Question: Remember that the whiskers on a boxplot can extend 1 5

Remember that the whiskers on a boxplot can extend 1.5 interquartile ranges (IQRs) from either end of the box, and values beyond that range are considered to be outliers. For normally distributed data, the mean and median are equal and are both centered in the middle of the box in a boxplot.

a. Draw the “box” part of a boxplot for normally distributed data. What fraction of an IQR is the distance between the mean/ median and the ends of the box?

b. For normally distributed data, how many IQRs above or below the mean/ median would a data value have to be in order to be considered an outlier?

a. Draw the “box” part of a boxplot for normally distributed data. What fraction of an IQR is the distance between the mean/ median and the ends of the box?

b. For normally distributed data, how many IQRs above or below the mean/ median would a data value have to be in order to be considered an outlier?

## Relevant Questions

Recall from Chapter 7 that the interquartile range (IQR) covers the middle 50% of the data. a. What range of standardized scores is covered by the interquartile range for normally distributed populations? In other words, ...Math SAT scores for students admitted to a university are bell-shaped with a mean of 520 and a standard deviation of 60. a. Draw a picture of these SAT scores, indicating the cutoff points for the middle 68%, 95%, and 99.7% ...Using Table 8.1, a computer, or a calculator, determines the standard score that has the following percentage of the population below it: a. 25% b. 75% c. 45% d. 98% According to an article in The Seattle Times (Meckler, 2003), living organ donors are most often related to the organ recipient. Table 9.5 gives the percentages of each type of relationship for all 6613 cases in which an ...Refer to Figure 1 on page 691 of Original Source 11, linked to the companion website, “Driving impairment due to sleepiness is exacerbated by low alcohol intake.” a. What type of picture is in the figure? b. Write a ...Post your question