Exam 3: Descriptive Statistics: Numerical Measures

The following data show the yearly salaries of football coaches at some state supported universities. For the above sample, determine the following measures. a.The mean yearly salary b.The standard deviation c.The mode d.The median e.The 70th percentile

Given the following information: Standard deviation = 8 Coefficient of variation = 64% The mean would then be

The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals

A numerical value used as a summary measure for a sample, such as sample mean, is known as a

The symbol $\sigma$ ² is used to represent

The difference between the largest and the smallest data values is the

If the coefficient of variation is 40% and the mean is 70, then the variance is

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20. In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40. In which state do the wages of cashiers appear to be more dispersed?

The table below shows the population growth rate of a city for the years 2008 through 2012. a.Compute the geometric mean. b.What has been the percentage growth in the population of the city between 2009 to 2012?

The following frequency distribution shows the yearly tuition (in $1,000s) of a sample of private colleges. For the above data, compute the mean yearly tuition. (Give your answer in dollars.)

In computing the mean of a sample, the value of $\Sigma$ x_i is divided by

Below is a sample of scores from a professor's most recent exam. Calculate the following. a.The mean b.The standard deviation c.The 65^th percentile (Round to the nearest hundredth, as needed.)

The median is a measure of

The following frequency distribution shows the ACT scores of a sample of students: For the above data, compute the following. a.The mean b.The standard deviation

During a cold winter, the temperature stayed below zero for ten days (ranging from -20 to -5). The variance of the temperatures of the ten-day period

Exhibit 3-6 The closing stock price of MNM Corporation for the last 7 trading days is shown below. -Refer to Exhibit 3-6. The median is

Compute the weighted mean for the following data.

If two groups of numbers have the same mean, then

Since the population is always larger than the sample, the value of the sample mean

From a population of size 500, a random sample of 50 items is selected. The mode of the sample