Sophia Learning Intro to Statistics. Final Milestone Study Guide B (Complete Solutions)

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Sophia Learning Intro to Statistics Final Milestone Study Guide B Sophia Learning Intro to Statistics Final Milestone Study Guide B Sophia Learning Intro to Statistics Final Milestone Study Gui... de B 1. Ralph records the time it takes for each of his classmates to run around the track one time. As he analyzes the data on the graph, he notices very little variation between his classmates’ time. Which component of data analysis is Ralph observing? 2. Which of the following is an example of a parameter? 3. Carl’s recorded the number of customers who visited his new store during the week: Day Customers Monday 17 Tuesday 13 Wednesday 14 Thursday 16 He expected to have 15 customers each day. To answer whether the number of customers follows a uniform distribution, a chi-square test for goodness of fit should be performed. What is the chi-squared test statistic? Answers are rounded to the nearest hundredth. 4. A magician asks an audience member to pick any number from 6 to 15. What is the theoretical probability that an individual chooses the number the magician has in his mind? 5. Adam tabulated the values for the average speeds on each day of his road trip as 60.5, 63.2, 54.7, 51.6, 72.3, 70.7, 67.2, and 65.4 mph. The sample standard deviation is 7.309. Select the 98% confidence interval for Adam’s set of data. 6. An insurance firm wants to estimate the percentage of senior citizens in a small town with approximately 2,534 residents. It asks a group of 85 randomly selected people in town about their age. Select the statement that is true. 7. A market research company conducted a survey of two groups of students from different schools. They found that students from school A spent an average of 90 minutes studying daily, while the students from school B spent an average of 75 minutes daily. They want to find out if the difference in the mean times spent studying by the students of the two schools is statistically significant. Which of the following set shows the correct null hypothesis and alternative hypothesis? 8. Zhi and her friends moved on to the card tables at the casino. Zhi wanted to figure out the probability of drawing a King of clubs or an Ace of clubs. Choose the correct probability of drawing a King of clubs or an Ace of clubs. 9. The scores of the quizzes of five students in both English and Science are: English Science Student 1 6 8 Student 2 5 5 Student 3 9 6 Student 4 4 7 Student 5 8 9 For English the mean is 6.4 and the standard deviation is 2.0. For Science the mean is 7 and the standard deviation is 1.6. Find the correlation coefficient, r, for this set of scores. Answer choices are rounded to the nearest hundredths. 10. Jenae changed the original coffee labels with plain white ones that had a flavor printed in bold black letters and she placed them on the coffee pots for a week-long experiment. Jenae used an aspect of experimental design known as ____________when she created the labels to have the same appearance. 11. Researchers want to test the effects of a new weigh loss program. They believe that gender is a significant factor. The participants are divided by gender. Then, within each group, participants are randomly assigned to either the treatment or control group. Which of the following would be the most effective to test the effects of the new weight loss program? 12. Which of the following data types will be continuous. 13. Which of the following is an example of a false negative? 14. Jerry graded seven standardized tests with the following scores: 60, 74, 41, 87, 94, 79, 57. Which standardized test score represents the 50th percentile? 15. Mark looked at the statistics for his favorite baseball player, Jose Bautista. Mark looked at seasons when Bautista played 100 or more games and found Bautista’s probability of hitting a home run in a game is 0.173. If Mark uses the normal approximation of the binomial distribution, what will the variance of the number of home runs Bautista is projected to hit in 100 games? Answer is rounded to the tenths place. 16. Melissa is conducting a survey of her classmates because her teacher wants the class to learn more about hygiene habits. Melissa has developed a list of 10 questions. “Do you brush your teeth every day?” is the first question she asks. Which type of question is Melissa asking? 17. When a survey was conducted among 100 students to find their favorite pizza topping, 45 students voted for pepperoni, 25 students voted for mushrooms, and 30 voted for cheese. If a pie chart were made showing the number of votes for each topping, the central angle for cheese sector would be ¬¬¬¬_____________? [Show More]

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