A national survey shows that Americans throw away an average of 65 recyclable items per week. A random sample of 85 residents in Beverly Hills is drawn and the mean is calculated. Given only this information, what formula would you use to determine if the mean of this sample is significantly different from the population mean?
a. z-test for single mean
b. z-test for the difference between two independent means
c. t-test for a single mean
d. t-test for the difference between two independent means
e. None of the above
Ans: c
You might also like to view...
According to Kohlberg's theory of moral development, at the preconventional level, moral reasoning is controlled by external rewards and punishments.
a. true b. false
One key to working successfully with infants and toddlers is to
A) whistle and sing frequently. B) discover their similarities. C) discover their differences. D) discover their preferences. E) hold them gently.
The purpose of strategy instruction is to
a. focus on the process of learning. b. focus on the teaching skills. c. focus on breaking down skills into parts. d. focus on building student background knowledge
"PDF" stands for:
A. Portable Digital Format B. Portable Document Format C. Presentable File Format D. Presentable Document Format