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Calculate the mean level of phosphate for the nine clinic visits in mg per dL.

The level of various substances in the blood is known to influence our health. Below are measurements of the level of phosphate in the blood of a patient, in milligrams of phosphate per deciliter of blood, made on nine consecutive visits to a clinic.

5.6

5.2

4.6

4.9

5.7

6.4

5.9

6.7

4.2

Enter your answer, corrected to 2 decimal places, below:

Based on this boxplot, which of the following statements is true?

The following is a boxplot made from the verbal GRE exam scores of applicants in an entrance test to a university.

** Select all correct answers.

An applicant with a score of 700 will be among the top 25% for this entrance test.

The distribution of verbal GRE exam scores is fairly symmetric.

About half the students scored over 500.

Nobody scored an 800.

The five-number summary of the ages of 18 teachers in a university maths department was found to be

(32, 39, 47.5, 58, 68)

Using the rule for identifying outliers, what is the upper boundary in years above which values would be regarded as high outliers? Enter the numeric value only below:

Calculate the median level of phosphate for the nine clinic visits in mg per dL. Enter only the number value below.

5.6

5.2

4.6

4.9

5.7

6.4

5.9

6.7

4.2

The histogram below shows the average property damage in millions of dollars caused by tornadoes over a 50-year period in each of the 50 states and Puerto Rico.

From the histogram, the first quartile must be

in the interval 30–40.

in the interval 10–20.

in the interval 0–10.

greater than 10.

The following histogram represents the distribution of acceptance rates (percent accepted) among 25 business schools in 2004. In each class interval, the left endpoint is included but not the right, so the class intervals are 10 ≤ rate < 15, 15 ≤ rate < 20, etc.

What is the approximate shape of this distribution?

uniform

bell-shaped symmetrical

skewed to right

skewed to left

Which of the following statements best describes what a histogram shows?

The five number summary of the data.

The amount of data overall.

The data values from minimum to maximum.

The frequency of data within set intervals of value.

A description of different houses on the market includes the following variables:

monthly utilities bill (e.g. $230.00)
quarterly rates bill (e.g. $540.00)
suburb (e.g. Clayton)
area postcode (e.g. 3800)

Which of the variables are quantitative?

area postcode, utilities bill and rates bill

area postcode code and suburb

the monthly utilities bill

all choices represent quantitative variables

utilities bill and rates bill

According to a website, the average height of Australian males follows a normal distribution with a mean of 175.6 cm and a standard deviation of 7 cm.

What percentage of Australian males is taller than 180 cm? Use table A. Give two decimal places. %