After giving a statistics exam, Professor Dang determined the following five-number summary for her class results. 55 63 73 86 95 Use this information to draw a boxplot of the exam scores. Choose the correct graph below. O A. 60 Scores 80 Percent 100 B. 60 Scores 80 Percent 100 Q Q O C. 60 Scores 80 Percent 100
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- The Internet The NAEP report described in Exercise 39compared science scores for students who had homeInternet access to the scores of those who did not, asshown in the graph. They report that the differences arestatistically significant.a) Explain what “statistically significant” means in thiscontext.b) If their conclusion is incorrect, which type of error didthe researchers commit? c) Does this prove that using the Internet at home can im-prove a student’s performance in science?The World Bank collects information on the fertility rate (children per woman) in the country and the life expectancy of a person (in years) in each country ('Life expectancy at,' 2013 and 'Fertility rate,' 2013). The data for 23 randomly selected countries for the year 2011 are in the table below. a) Since data were collected for variable(s), the correct graph to make is a .b) Make a scatterplot of X versus Y using technology. Use this graph to answer the part below. c) Which of the following is true about the relation between fertility rate and average life expectancy based on the graph above?Rita is a runner. She records the amounts of time that it takes her to run different distances in the scatter plot below. Which statements are true? a) There is a least one outlier represented in the scatter plot. b) There is a linear association between distance and time in the scatter plot. c) There is a nonlinear association between distance and time in the scatter plot. d) There is a positive association between distance and time in the scatter plot. e) There is a negative association between dstance and time in the scatter plot.
- HR manager in L&B real-state company is working with finance department in improving thesalaries and the following descriptive statistics were obtained ( The table attached ) ( The graph attached ) ------------ The company has hired you to answer the following questions:1) Find the missing values of (a), (b), (c) and (d). 2) Do you think that the salaries in the departments are skewed, justify your answer with proper measurefrom table (2).3) Based on the boxplot for the salaries by department in graph (1), comment on the graph in terms ofexistence of outliers, skewness and which department has higher outliers.4) Based on your answer in (3), comment and compare on the suitable central and absolute dispersionmeasures depending on table (2).5) Based on table (1), do you think the salaries of which group is more homogenous, support your answerand comment on the results.1, on the survey, the question "what is your favorite season: winter, spring, summer, fall?" appears. a) what type of data (continuous, discrete, categorical) is being collected?. explain. b) what type of graph would be best to represent this information? explain.The coaches of a group of debate teams answered a survey about hours of debate and number of team wins. The graph shows the result of the survey. Based on these results if a team practices 6 hours per week next season, which is the best estimate of the number of debates the team can expect to win? 1 24 2 20
- 6. The table below shows last semester’s cumulative scores for the seven students sitting closest to the front in lecture and the seven students sitting furthest back in lecture. Determine how this data could be best represented graphically and construct a graph. Should you use a line or bar graph? Use the example graphs provided to ensure you have a “complete” graph. Table 2. Final cumulative scores for students sitting closest to the front and furthest back in Biology 10 lecture. Seating Location Student Scores Front of class Gary 76 Veronica 97 Rodrigo 94 Ying 87 Mohammad 84 Kayla 71 Saundra 68 Back of class Heidi 62 Duy 70 David 74 Joey 65 Lisa 73 Hei 64 Jose 82Q6A The World Bank collected data on the percentage of GDP that a country spends on health expenditures ("Health expenditure," 2013) and also the percentage of women receiving prenatal care ("Pregnant woman receiving," 2013). The data for 14 countries where this information is available for the year 2011 are in following table (note: outlier data has been removed): Data of Health Expenditure versus Prenatal Care Health Expenditure (% of GDP) Prenatal Care (%) 3.7 54.6 5.2 93.7 5.2 84.7 10.0 100.0 4.7 42.5 4.8 96.4 6.0 77.1 5.4 58.3 4.8 95.4 4.1 78.0 6.0 93.3 9.5 93.3 6.8 93.7 6.1 89.8 Test at the 5% level for a correlation between percentage spent on health expenditure and the percentage of women receiving prenatal care. (i) Which of the following statements correctly define both the null hypothesis HOand the alternative hypothesis HA ? A. HO : ρ = 0 HA : ρ < 0 B. HO :…Q6.2 The World Bank collected data on the percentage of GDP that a country spends on health expenditures ("Health expenditure," 2013) and also the percentage of women receiving prenatal care ("Pregnant woman receiving," 2013). The data for 14 countries where this information is available for the year 2011 are in following table (note: outlier data has been removed): Data of Health Expenditure versus Prenatal Care Health Expenditure (% of GDP) Prenatal Care (%) 3.7 54.6 5.2 93.7 5.2 84.7 10.0 100.0 4.7 42.5 4.8 96.4 6.0 77.1 5.4 58.3 4.8 95.4 4.1 78.0 6.0 93.3 9.5 93.3 6.8 93.7 6.1 89.8 Test at the 5% level for a correlation between percentage spent on health expenditure and the percentage of women receiving prenatal care. (iv) Calculate and enter test statistic Enter value in decimal form rounded to nearest hundredth, with appropriate sign (no spaces). Examples of correctly…
- Number of cards 0 1 2 or 3 4 or more Number of people 66 54 42 41 Construct a pie graph for the given data10. The mosaic plot shows the distribution of favorite math class for students and teachers at East Kentwood High School. Based on the graph, which of the following statements is true? (A) There are more teachers than students who chose their favorite math class as AP Calc. (B) 100% of students chose Intro Stats as their favorite math class. (C) When combining students and teachers, AP Stats has the highest overall proportion who chose it as their favorite math class. (D) 80% of students chose AP Calc. (E) There are more teachers than students at East Kentwood High School.Scenario: A pediatrician wants to determine the relation that may exist between a child’s height and head circumference. She randomly selects eleven 3-year old children from her practice, measures their heights and head circumference, and obtains the data shown below: Child’s Height and Head Circumference Height (inches) Head Circumference (inches) 27.75 17.6 24.5 17.3 25.5 17.4 26 17.5 25 17.1 25.75 17.8 26.5 17.5 27 17.7 26.75 17.5 26.75 17.8 27.5 17.7 If the pediatrician wants to use height to predict head circumference, determine which variable is the explanatory variable and which is response variable. Draw a scatter diagram of the data. Draw the best fit line on the scatter diagram. Does this scatter diagram show a positive, negative, or no relationship between a child’s height and the head circumference?
