Answer the following statement(s) true (T) or false (F)
1. A normal distribution (Appendix A) is an example of a probability distribution.
2. The standard deviation of a probability distribution is also called a standard error.
3. The formula for calculating a confidence interval for samples larger than 30 is .
4. When the sample size is smaller than 30, the normal distribution is replaced by the t distribution for calculating confidence interval.
5. Confidence intervals are also calculated for proportions (e.g., polling data).
1.true
2.true
3.true
4.true
5.true
You might also like to view...
Which of the following is NOT true of Iran's economy prior to the Islamic Revolution?
a. Iran was an important member of OPEC. b. Iran was a major purchaser of arms, especially from the United States. c. Many landowners stopped growing food and turned to commercial export crops leading to several disastrous famines. d. The country became dependent on oil as a commodity that was subject to volatile market prices. e. Iran had significant trade relations with neighboring and other developing countries.
In Plessy v. Ferguson the Supreme Court adopted the doctrine of "separate but equal" to uphold laws that segregated people according to race
Indicate whether the statement is true or false