Introduction to Statistics Milestone 1 Sophia question with complete solution

Introduction to Statistics Milestone 1 Sophia question with complete solutionJay wants to study nutrition and performance in schools using available data. Which of the scenarios below will provide Jay with available data? Going to a local high school and asking the principal for information about students' current and previous grades, then asking the health teacher for the results from a survey students took in health class Which of these random samples represents a representative sample of the number of students in a middle school who walk to school? 150 random students at lunch It's Saturday afternoon, and Denise is going shopping. She stops by a department store because she needs a new pair of shoes. She has picked out three styles that she likes. The store associate asks, "What is your shoe size?" Which type of question has the store associate asked? Closed question A local gym conducts a survey among the people in a mall. Which survey question would have a qualitative response? Do you exercise daily? 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? A survey A factory manufactures motorcycles. One of its employees, working in the quality control department, checks the first 10 and the last 10 motorcycles manufactured in a day. This is what type of sampling? Convenience sampling 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? Home appliance sales increased profits by 8 percentage points Rob sent an email survey to 2,000 cell phone owners asking about their satisfaction with their current plan. Only 256 people returned the survey and they were predominately 18-24 years old. Which of the following statements is true? The survey likely has bias because the people who could not answer differ from those who did answer. 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? Selection bias A new pet food product for small dogs has been developed to help with tooth decay. Fifty-two dogs participate in the study. Each dog owner picks a card from a standard deck out of a hat. If the card is red, their dog will be in the treatment group. If the card is black, their dog will be in the placebo group. Which experimental design was used? Completely Randomized Design A different coffee seller offered to sell coffee to Jenae's company for half the cost of their current brand. Jenae knew her co-workers were really partial to the coffee they drank now, so she decided to conduct a study to see if they noticed the difference in flavor. Her co-workers were convinced they would. Jenae provided each person with a sample and said that some had the new coffee and some did not. Only Jenae knew who had which brand of coffee. Jenae's strategy is an example of a(n) ________. blind experiment A survey was conducted to find the frequency with which people go to the movies. A group of 120 people in a mall were asked about how often they go out for a movie and It was found that 36 people go to movies at least once in a month. Which of these is an example of descriptive statistics? 30% of the people surveyed in the mall go to movies at least once in a month. Select the correct statement regarding experiments. A researcher can control the environment and observe the response 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? A matched-pair design experiment