INTRO TO STATS Milestone 1 Sophia CORRECT answers

INTRO TO STATS Milestone 1 Sophia You passed this Milestone 24 questions were answered correctly. 5 questions were answered incorrectly. 1 In a game, Rachel throws three bean bags, aiming for the hole in the wooden board. Which of the following best classifies the arrangement of bean bags? CONCEPT Accuracy and Precision in Measurements 2 Which of these random samples represents a representative sample of the number of students who enjoy science class? • CONCEPT Random & Probability Sampling 3 The owner of a pizza parlor called every fifth person who ordered pizza last week to rate the pizza. What type of statistical study is this? CONCEPT Surveys 4 “Ugh,” Daniel says as he notices an office memo on his desk. It had been a fun weekend, and Monday morning came much too soon. He goes to the kitchen to refill his coffee mug. On the way, he runs into Sean, who asks, “How do you feel about the new office dress code?” Which type of question has Sean asked? CONCEPT Question Types 5 Which of the following data types will be continuous? CONCEPT Discrete vs. Continuous Data 6 Scientists want to test a new pair of running shoes. A speed test is performed with two separate groups of participants. The treatment group will wear the new pair of running shoes, while the control group will not. It is believed that age and height may affect speed. Which of the following would be most effective in controlling the confounding variables, such as age and height, in this study? CONCEPT Matched-Pair Design 7 A local gym conducts a survey among the people in a mall. Which survey question would have a qualitative response? • CONCEPT Qualitative and Quantitative Data 8 Aaron has designed a trial to test a new energy drink. Fifty individuals in the treatment group try the new energy drink every day for two weeks, and they describe a moderate increase in their energy levels. Fifty individuals in the control group drink sugar water every day for two weeks, and they describe a significant increase in their energy levels. What has Aaron observed? CONCEPT Placebo 9 A study in which results are measured without intervention from the researcher is called a(n) __________. CONCEPT Observational Studies and Experiments 10 An appliance store manager noted that the sales of home appliances contributed 74% of the store's profits in the year 2010 and 82% in the year 2011. Of the following choices, which statement about home appliance sales is true? CONCEPT Using Percentages in Statistics 11 A pizza owner asked 50 customers to taste a new type of topping and found that 40 people liked its taste. Which of these is an example of descriptive statistics? CONCEPT Statistics Overview 12 A research team conducts a survey to determine the area of land used for farming in Iowa. The team randomly selects house addresses and sends the survey by mail. Which type of sampling method is the research team using? CONCEPT Simple Random and Systematic Random Sampling 13 To test the effectiveness of a new, cholesterol-lowering drug, a group of researchers recruits 200 volunteers with high cholesterol to take part in a study. The researchers place the numbers 1 through 200 in a hat and have each participant select a number. Those who picked an odd number receive the new drug, while those who picked an even number receive a placebo. Which experimental design are the researchers using? CONCEPT Completely Randomized Design 14 In a bolt-manufacturing factory, it is estimated that 6% of the bolts being manufactured will be defective, with a 3% margin of error. Choose the statement that correctly describes the confidence interval. This gives us a CI of 3% to 9%. CONCEPT Margin of Error 15 A grocery store owner asked the first 20 children who visited the store one day about their favorite snack. This is what type of sampling? • CONCEPT Convenience & Self-Selected Samples 16 A local school newspaper's editor wants to survey students to determine the approval rating of the current student council president. How would the newspaper apply the cluster sampling method to find this information? • CONCEPT Stratified Random and Cluster Sampling 17 James conducts a survey to study the relationship between cell phone use and grades earned during the fall semester. James suspects that there might be a lot of other factors that affect grades besides cell phones. Which of the following could be a confounding variable in James's study? CONCEPT Variables 18 To compare the teaching methodologies of two of its eighth-grade math teachers, a school decides to compare student test scores from the two classes throughout the year. Which type of statistical study is the school conducting? CONCEPT Prospective and Retrospective Studies 19 A travel agency contacted a department store and obtained the list of all people who made purchases using their credit cards at the store in the last month. The agency then surveyed a random sample from the list, calling them to ask their preference for air travel or train travel for taking holidays. Which of the following types of bias affects the conclusions of the survey? CONCEPT …………………………………………………CONTINUED……………………………………….