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Estimate the population proportion

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Reference no: EM131981817

Question 1. Use the given data to find the sample size required to estimate the population proportion. Margin of error: 0.012; confidence level: 98%; p and q unknown

Question 2. Answer True or False

Assume a random sample of size n is from a normal population. Assume a single sample t test is used to for hypothesis testing. The null hypothesis is that the population mean is zero versus the alternative hypothesis that it is not zero. If the sample size is decreased, and the Type I error rate is unchanged, then the Type II error rate will increase. 

Question 3. Multiple Choice

Which of the following statements is not true?

a. The sampling distribution of a statistic is the probability distribution for that statistic based on all possible random samples from a population.

b. A symmetric, heavy-tailed distribution cannot be detected using a boxplot and QQ chart.

c. The t-statistic distribution is based upon the assumption of a random sample from a normal population.

d. If the sample size is increased and the same test statistic is used, the type I error rate can be changed which will affect the power of the test.

Reference no: EM131981817

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