MTH Revised Test 2023.

MTH Revised Test 2023. A regional airline service advertises that their average ticket price is $75. Given that their ticket prices are $14, $85, $94, and $107, why is this statistic misleading? - ANSWER The data contains an outlier. In order to study the shoe sales of people in his store, Billy samples the population by dividing the customers by age and randomly selecting a proportionate number of customers from each age group. Which type of sampling is used? - ANSWER stratified sampling Given that Cheryl is collecting data on car color, what type of data is she working with? - ANSWER qualitative A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating the accuracy of the device for governmental approval and has decided to test the claim "The glucose level reported by the wristband is within 10% of a standard blood test result." Which of the following data collection processes would be appropriate? Select only one answer choice. - ANSWER To compare the wristband to the standard blood test, both methods should be used to measure the blood sugar of the same person at the same time. The people chosen should be random, and the time of measurement should be random to help eliminate the effects of any confounding variables. A taxi agency collected data from a random sample of 600 people in their city asking whether or not they own a car. Based on the results, they report that 44% of the people in the state own a car. Why is this statistic misleading? - ANSWER the sample is biased A farmer divided his piece of land into 2 equivalent groups and the quality of the soil is the same in both of these groups. He used fertilizers for the first group of land. He did not use fertilizers for the second group of land. At the end of the season, he measured the yield of the crops in these 2 groups. Is the study observational or experimental? If it is an experiment, what is the controlled factor? - ANSWER The study is an experiment. The controlled factor is the fertilizer. A restaurant surveys its patrons to pick their favorite item on the menu. What is the level of measurement of the data? - ANSWER nominal Is a survey that asks the opinions of students about a proposed tour program to a hill station an observational study or experimental study? If it is an experimental study, what is the controlled factor? - ANSWER The study is an observational study. Continuous is the type of quantitative data that is the result of measuring. T/F -