A consumer interest group is tracking the percentage of household income spent on gasoline over the past 30 years. Which graphical display would be more useful, a histogram or a time-series graph. Why? a. A histogram because the change in data over time is the most relevant issue. b. A time-series graph because the change in data over time is the most relevant issue.     c. A time-series graph because the range of values for the data is the most relevant issue. 6. A histogram because the range of values for the data is the most relevant issue.

Part 2: The graph below represents the relative frequency of heads that occur (number of heads divided by the total number of tosses) versus the number of times the coin was tossed for the first io00 tosses. The table shows these values, and in addition, the total number of heads for the 991st to 1000th tosses. Use this information to answer the questions below. Long Term Relative Frequency 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 100 200 300 400 500 600 700 800 900 1000 Number of Coin Flips Long Term Relative Frequency Number of 991 992 993 994 995 996 997 998 999 1000 Tosses Number of Heads 511 512 513 513 514 515 515 515 515 515 Relative Frequency of Heads 0.5156 0.5161 0.5166 0.5161 0.5166 0.5171 0.5165 0.516 0.5155 0.515 d) Since the coin is fair, on average, approximately half of the tosses should be heads. So when the coin is tossed 1000 times approximately 500 of the tosses should be heads. What is the actual number of heads for 1000 tosses as given by the chart? e) What is the…

Does this graph have trends and/or seasonality? What forecasting method is suitable for this data?

A number of tools can be used in business process improvement. Of them a __________ is a type of chart that contains both bars and a line graph, where individual values are represented in descending order by bars, and the cumulative total is represented by the line.

Question 9 The first quartile (Q1) corresponds to the The median corresponds to the th The third quartile (Q3) corresponds to the th percentile. percentile. th percentile.

C8. According to the Pew Research Center (2015), recent immigrants are better educated than earlier immigrants to the United States. The change was attributed to the availability of better education in each region or country of origin. The percentage of immigrants 25 years of age and older who completed at least high school is reported in this table for 1970 to 2013. Write a statement describing the change over time in the percentage who completed at least a high school degree. 1970 1980 1990 2000 2013 Mexico 14 17 26 30 48 Other Central/South America 57 53 60 66 Asia 75 72 75 82 84 48 68 81 87 95 Europe 36 48 52 58 72 Caribbean 81 91 88 85 85 Africa Source: Pew Research Center, Modern Immigration Wave Brings 59 Million to U.S., Driving Population Growth and Change Through 2065, 2015. Retrieved from https://www.pewresearch.org/hispanic/2015/09/28/modern- immigration-wave-brings-59-million-to-u-s-driving-population-growth-and-change-through-2065/ 52

A professor went to a website for rating professors and looked up the quality rating and also the "easiness" of the six full-time professors in one department. The ratings are 1 (lowest quality) to 5 (highest quality) and 1 (hardest) to 5 (easiest). The numbers given are averages for each professor. Assume the trend is linear, find the correlation, and comment on what it means. Calculate the correlation. r = (Round to three decimal places as needed.) Comment on the meaning of the correlation. Choose the correct interpretation below. OA. The professors that have high easiness scores tend to also have low quality scores.. OB. Being "easy" as a professor causes students to regard the professor as having a higher quality. OC. The professors that have high easiness scores tend to also have high quality scores. OD. Being "easy" as a professor causes students to regard the professor as having a lower quality. Quality Easiness D 4.7 3.7 4.7 3.1 4.2 3.5 4.2 2.6 3.9 1.9 3.5 1.8

3. What type of graph should you create to visualize the following frequency data? Explain. - Counting the brands of cell phones owned by student - The different body weights reported in a statewide survey - The people falling into one of the eigth salary ranges - The number of students who were absent from class each day for the month of October - The number of students falling into A, B, C, D or F grade range  - The time it takes a sample of college students to complete some memory task - The direction of a person's eye movement (right, left, or center) when s/he is telling a lie

. Death 2010 The January 2012 National Vital StatisticsReport by the Centers for Disease Control and Preventionincluded information on deaths in the United States forthe year 2010. The 4 most common causes-heart disease,cancer, respiratory diseases, and stroke-accounted fornearly 60% of all deaths. What problems do you see withthe graph at the top of the next column?

The graph below is an ogive of scores on a math test. The vertical axis in an ogive is the cumulative relative frequency and can also be interpreted as a percentile. Use the graph to approximate the test score that corresponds to the 30th percentile. O A. 9 ОВ. 4 Percentile Ranks of Math Test Scores ОС. 56 100- 90- O D. 50 80- 70- 60- 50- 40- 30- 20- 10- 0- -> O 10 20 30 40 50 60 70 80 90 100 Test Socore (96) Click to select your answer. Percentile