Question
A population consists of all the weights of all defensive tackles on a university's football team. They are Johnson, 204 pounds; Patrick, 215 pounds; Junior,
A population consists of all the weights of all defensive tackles on a university's football team. They are Johnson, 204 pounds; Patrick, 215 pounds; Junior, 207 pounds; Kendron, 212 pounds; Nicko, 214 pounds; and Cochran, 208 pounds. What is the population standard deviation (in pounds)?
About 4 |
About 16 |
About 100 |
About 40 |
A sample of the personnel files of eight male employees revealed that, during a six-month period, they were absent the following number of days: 2, 0, 6, 3, 10, 4, 1, and 2. What is the mean deviation (in days)?
1 |
0 |
3.125 |
2.375 |
A question in a market survey asks for a respondent's favorite car color. Which measure of central location should be used to summarize this question?
Mode |
Median |
Mean |
Standard deviation |
For a sample of similar sized all-electric homes, the March electric bills were (to the nearest dollar): $212, $191, $176, $129, $106, $92, $108, $109, $103, $121, $175, and $194. What is the range?
$100 |
$130 |
$120 |
$112 |
Which one of the following is referred to as the population mean?
s |
The distribution of a sample of the outside diameters of PVC pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68% of the outside diameters lie between what two amounts?
13.5 and 14.5 inches |
13.0 and 15.0 inches |
13.9 and 14.1 inches |
13.8 and 14.2 inches |
The weights of a sample of crates ready for shipment to Moscow, Russia are (in kilograms): 103, 97, 101, 106, and 103. What is the mean deviation?
0 kg |
6.9 kg |
102.0 kg |
2.4 kg |
A sample of wires coming off the production line was tested for tensile strength. The statistical results (in PSI) were the following:
According to the Empirical Rule, the middle 95% of the wires tested had a tensile strength between approximately what two values?
450 and 550 |
460 and 540 |
420 and 580 |
380 and 620 |
The ages of all the patients in the isolation ward of the hospital are 38, 26, 13, 41, and 22. What is the population variance?
106.8 |
91.4 |
240.3 |
42.4 |
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started