Exam 3: Summarizing Data: Measures of Location

For a set of data which contains extreme values, the best measure of a central location among the following is the

The frequency distribution of grades on a test for a class of 30 students is given below: -Find $Q_{3}$ .

The number which appears most often in a data set is called the _______.

Write the following expression as a summation: $x_{1}{ }^{2}+x_{2}{ }^{2}+\ldots+x_{15}{ }^{2}$

The prices (in dollars) of 16 film video cassettes on sale at a video store are given below. $38,32,38,13,23,38,32,28,27,32,23,27,25,32,27,30$ -For this data, find the mode.

When calculating the mean for grouped data, the denominator is equal to the number of rows in the table.

The median of an odd number of values is _______ the middle number in the list.

Which of the following measures is not equal to the other measures?

The measure of location that is used to average rates of change is the _______.

For the data 1, 2, 4, 6, 8, 12, and 15, which of the following measures of location is not changed if either the 4, 6, or 12 is removed?

When data contains extreme values, which of the following is the poorest measure of location?

The following is the distribution of weights (in lbs.) of 40 students entered in a hamburger eating contest:. -Find $D_{7}$ .

If the mean of a set of raw data is subtracted from each of the numbers, the mean of the new set of data is _______.

In a list of nine numbers, the median is always the fifth number from either end of the list.

The mean of a list of numbers is more likely to be affected by extreme values than the median.

For a sample size of 15 values, if the largest value is increased, the midquartile is increased.

If coding is used to calculate the mean more easily for a frequency distribution with seven classes, the coded value of the second class is _______.

If an investor buys $\$ 1000$ worth of stock at $\$ 20$ per share, $\$ 1000$ worth at $\$ 10$ per share, and $\$ 1000$ worth at $\$ 30$ per share, what is the average price per share?

If $x_{1}=3, x_{2}=4, x_{3}=1, x_{4}=5, f_{1}=1, f_{2}=2, f_{3}=2, f_{4}=1$ , find $\sum_{i=2}^{4} x_{i}^{2}$ .

The 65th percentile is always less than