a. Does this sample provide enough evidence to suggest that the number of résumés that were received in 2017 has changed
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
According to the Glassdoor.com, each job opening on average attracted 250 résumés in 2016. You know that the job market improved in 2017 compared to 2016, which means that more people will likely be switching jobs but also fewer unemployed workers remain in the labor market. To find out which trend is stronger, you take a random sample of 20 employers in your area and ask them to report how many résumés they received in 2017 for each job opening. Here are their answers: 212, 216, 228, 256, 208, 176, 260, 228, 280, 220, 204, 240, 220, 212, 244, 244, 196, 204, 244, 224
Using a = 0.05, answer the following:
a. Does this sample provide enough evidence to suggest that the number of résumés that were received in 2017 has changed?
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