Exam 2: Describing Data

Use the following The provided Minitab output displays descriptive statistics for the amount of financial aid, in thousands of dollars, awarded to a sample of students at a large university. ‪ -Find and interpret the z-score for the smallest financial aid amount.

Use the following In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were asked "In general, how much trust and confidence do you have in the mass media - such as newspapers, TV, and radio - when it comes to reporting the news fully, accurately, and fairly?" 81 said that they had a "great deal" of confidence, 325 said they had a "fair amount" of confidence, 397 said they had "not very much" confidence, and 214 said they had "no confidence at all". -Display the results in a frequency table.

Use the following The scatterplot shows the relationship between GPA and the number of Facebook friends for 30 students in a class. -For each corner of the scatterplot (top left, top right, bottom left, bottom right), describe a student whose responses place him or her in that corner.

Use the following A Fun-Size bag of M&M's contains 5 green, 3 red, 3 yellow, 4 orange, 4 blue, and 2 brown candies. -Sketch a bar chart of the data.

Use the following The states located in the Midwestern region of the country typically experience a large number of tornados every year. The number of tornadoes from 2000-2011 for four Midwestern states (Kansas, Nebraska, South Dakota, and Iowa) are displayed in the side-by-side boxplots. -Which state has the largest range?

Use the following A Fun-Size bag of M&M's contains 5 green, 3 red, 3 yellow, 4 orange, 4 blue, and 2 brown candies. -Construct a relative frequency table of the results. Use two decimal places in your relative frequencies.

Use the following Students in an introductory statistics course were asked to count the number of scars on their dominant hand (the one they write with the most). The results are displayed in the provided boxplot. -From the boxplot you can identify how many students are in the class.

Use the following In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were asked "In general, how much trust and confidence do you have in the mass media - such as newspapers, TV, and radio - when it comes to reporting the news fully, accurately, and fairly?" 81 said that they had a "great deal" of confidence, 325 said they had a "fair amount" of confidence, 397 said they had "not very much" confidence, and 214 said they had "no confidence at all". -In the same article, they compare opinions about the media in 2012 to those in the previous election year (2008). In 2008, 60% of Democrats, 27% of Republicans, and 41% of Independents had positive opinions (great deal/fair amount of confidence) about the media. For each political party, find the difference in the proportion of positive opinions in 2008 and the proportion of positive opinions in 2012. Comment on if/how opinions have changed for the political parties over the past four years.

Use the following Trying to determine the number of students to accept is a tricky task for universities. The Admissions staff at a small private college wants to use data from the past few years to predict the number of students enrolling in the university from those who are accepted by the university. The data are provided in the following table. -Interpret the intercept of the line in context. Does the interpretation make sense?

Use the following The finishing time for the top 100 men in the 2011 New York Marathon are displayed in the provided figure. -The median time for the top 100 males is closest to which value?

Use the following The side-by-side boxplots compare the top 100 men's and women's finishing times in the 2011 New York Marathon. -Which group tends to finish the race faster?

Use the following The least squares regression line is displayed on the provided scatterplot. Note that the points are displayed with numbers (each point having its own number), rather than points. -Which point has the most extreme negative residual?

Use the following to answer questions : One of the symptoms of the flu is an elevated pulse rate. Pulse rates (in beats per minute) for n = 23 patients with the flu are provided. ‪ -Give the five-number summary of these pulse rates.

Use the following The distribution of waiting times at the student health center is bell-shaped with a mean of 10 minutes and a standard deviation of 3. -Give an interval that is likely to contain about 95% of wait times.

Use the following Match the correlation to the corresponding scatterplot. -__________ -0.064

Use the following In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were asked "In general, how much trust and confidence do you have in the mass media - such as newspapers, TV, and radio - when it comes to reporting the news fully, accurately, and fairly?" 81 said that they had a "great deal" of confidence, 325 said they had a "fair amount" of confidence, 397 said they had "not very much" confidence, and 214 said they had "no confidence at all". -Sketch a bar chart of the data.

Use the following Match the five-number summary to the appropriate boxplot. -__________ 5, 8, 9, 11, 14

Use the following The provided histogram displays the number of Facebook friends for students in a small statistics class. -Which of the following best describes the shape of the distribution of the number of Facebook friends?

Use the following February 12, 2009 marked the 200^th anniversary of Charles Darwin's birth. To celebrate, Gallup, a national polling organization, surveyed 1,018 Americans about their education level and their beliefs about the theory of evolution. The survey results are displayed in the provided two-way table. -Find the proportion of respondents who believe in evolution for each education level (round each to three decimal places). Does there seem to be an association between education level and belief in evolution? If so, in what direction?

Use the following Trying to determine the number of students to accept is a tricky task for universities. The Admissions staff at a small private college wants to use data from the past few years to predict the number of students enrolling in the university from those who are accepted by the university. The data are provided in the following table. -What is the explanatory (X) variable?