Descriptive Statistics help with the explanation

3] (9 points} Identifying Statistical Concepts. The abstract' In the box below' us from an Elon University Polls report. - - - - - APRIL 9, 2021 A larger segment of North Carolina residents is now in favor of getting vaccinated against COVI D-19, with 63 percent of adults saying they have been vaccinated or plan to, the Elon University Poll has found. \"Vaccine support has increased dramatically since we started tracking attitudes in October 2020," Umsaid. \"At that time, only 33 percent of North Carolina residents said 'yes' when asked about their vaccine plans. Now, 63 percent have either already taken a vaccine or plan to take it when they can.\" Do you plan to take a COVID-sg vaccine? This is the rst of two releases from a survey of 1,395 residents of North Carolina that was conducted March 30 through April 2 using an online opt-in sample marketplace. The survey has a credibility interval of +{- 2.8 percentage points. The credibility interval is an accuracy measure for opt-in online surveys. A fuller explanation of the credibility interval and the survey methodology are available in the full report. Give examples, that can be found in the abstract, of three {3} of the statistical concepts in the list below. The abstract does not include all these concepts, you need to identify three that are in it. Write a short phrase summarizing each example you find. (For a similar question you might have Wan: 7719A Wage WW aw/W } Covariance Cross-Sectional data Parameter Population Qualitative variable: Quantitative variable: Sample: Standard Score: Statistic: Time series data: 2) (8 points)_Histograms Each histogram (below) represents the incomes of 100 people. The histograms are all drawn to the same scale. 60 50 Frequency Frequency Frequency Income Income Income A B C a) Which data set has the highest mean? How do you know? b) Which data set has the highest standard deviation? How do you know