Exam 5: Business Statistics

Assume the mean useful life of a particular lightbulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Calculate the useful life of lightbulbs within two standard deviations of the mean.

Find the mean (to the nearest tenth): .015, .082, .839, .851

The range of 105, 100, 79, 86, 101, 94, 98, 87, and 83 is:

From the following numbers, the median is: 16, 9, 10, 5, 4

In a normal distribution, data is spread asymmetrically about the median.

In finding the mode, you must arrange values from smallest to largest.

The range of 17, 24, 24, 27, 29, 31, and 36 is:

Intervals should be of unequal size.

Intervals can be used with bar graphs.

Calculate the range for the following June temperatures: 95.6, 69.2, 78.1, and 88.0

Hector Rameriz received three A's and one B in his college courses. What is his grade point average? Assume each course is three credits. A = 4, B = 3, C = 2, D = 1.

All means should be rounded to the nearest tenth.

At the college bookstore, the following sales were rung up. Based on this, prepare a frequency distribution. Use intervals of 0-$5.99, $6.00-$11.99, $12.00-$17.99, and $18.00-$23.99.

Sonny Industries reported in 2010 record profits of 37%. Cost of sales was 38%, and operating expenses were 25%. Could you prepare a pie graph for Sonny Industries?

Calculate the standard deviation (to the nearest hundredth) for the following sample set of data: 80, 92, 59, 46, 82, 74

A consumer price index is an example of a price relative.

Alvin's Bakery produced the following number of oat bran muffins each week: In a frequency distribution, which would have the lowest tally?

Today, a new truck costs $18,000. In 1980, the truck cost $9,000. What is the price relative?

The range of 35, 22, 43, 18, 22, 27, 48, 39, 31, and 16 is:

The range is the difference between the highest and lowest values in a series or group of values.