Statistics Quiz with Solutions (5 Questions)

by Electra Radioti
statistics quiz

statistics quiz

Statistics Quiz with Solutions (5 Questions)

Statistics Quiz with Solutions (5 Questions)

1 / 5

Find the probability, \( P(-2 < Z < 2) \) for a standard normal variable \( Z \).

2 / 5

_____ is the branch of statistics that involves organizing, displaying, and describing data.

3 / 5

Consider a random sample size of 400 drawn from a population, and the mean and standard deviation of the sample mean is 100 and 20 respectively. Calculate the standard deviation of the population.

4 / 5

As a part of his study, a researcher is interested to ascertain the proportion of people in a locality who are above the age of 80. He takes a random sample of 2,400; 120 of them are above the age of 80, hence 120/2,400 ≈ 0.05 or about 5% are above 80. What is the value of the statistic in this context?

5 / 5

_____ data are measurements for which there is no natural numerical scale, but which consist of attributes, labels, or other nonnumerical characteristics.

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