Question

Which of the following is an example of inferential statistics?

A.) A human resource manager at a company wants to know what percentage of the company's employees are caring for an elderly parent. Based on a questionnaire completed by all the company's employees, it is determined that 8% of the employees are caring for an elderly parent

B.) A survey is sent to half of the companys employees. It is determined that, for a sample of employees, 10% are caring for an elderly parent.

C.) An employee working for the Department of Energy constructs a bar chart portraying the country of origin of all the barrels of oil consumed in us last quarter

D.) Based on surveying a random sample of 700 convenience store employees in the US a researcher is 95% confident that between 27% and 33% of all convenience store employees in the US work full time.

Answer 1

we know that inferential statistic is about making a conclusion about entire population based on the sample data

option A is incorrect because no conclusion about the population is made in this statement as the researcher took the data for all employees in company and conclusion is made only for the company employees

option B is incorrect because the conclusion is made only about the sample data that 10% are caring for an elderly parent.

option C is incorrect because no conclusion is made in this statement except for making a bar chart

option D is correct answer because the sample data of 70 employees is used to make conclusion about entire population of employees in US who work full time