Which test is best to test the hypothesis that multiple variances (2 or more) are equal? Group of answer choices 1. t test 2. proportions test 3. Mood's median test 4. Levene's test 5. Analysis of Variance (ANOVA)
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- Which best describes the null hypothesis associated with an Analysis of Variance (ANOVA)? Group of answer choices a. Ho: Variance 1 = Variance 2 = Variance 3 b. Ho: Standard Deviation 1 = Standard Deviation 2 = Standard Deviation 3 c. Ho: Proportion 1 = Proportion 2 = Proportion 3 d. Ho: Median 1 = Median 2 = Median 3 e. Ho: Mean 1 = Mean 2 = Mean 3Under what circumstances would the Mood's Median non-parametric test be applied in business research? Group of answer choices a. The data are not normally distributed b. Outliers in the data exist c. Multiple medians are to be compared d. Answers 1 and 2 only e. Answers 1, 2 and 3A company that sells and services car music systems has surveyed residents of the local area surrounding the store as a way to expand their business. They handed out cards at a busy intersection near the store over a two-weekend time period. After a month, they have received 200 responses out of 950 they distributed. The results of this survey will likely be ineffective because a handing out postcards is not a legitimate survey method handing out postcards is not a legitimate survey method b the sample of people may not be the store’s appropriate target the sample of people may not be the store’s appropriate target c not enough people responded not enough people responded D participants did not get a reward for responding
- #8 A cracker manufacturer wants to know how a new cracker she wants to make compares to the competition, so she has people in a sample of supermarkets across the country ask people to compare three crackers: one of her crackers and two competing crackers. This is an example of what kind of statistical study? Experiment Survey Observational StudyA sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only indepen- dent variable. Develop another model with weight as the independent variable. Which of these two models is better? Explain. MPG 44 44 40 37 37 34 35 32 30 28 26 26 25 22 20 21 18 18 16 16 4 HORSEPOWER 67 50 62 69 66 63 90 99 63 91 94 88 124 97 114 102 114 142 153 139 WEIGHT 1,844 1,998 1,752 1,980 1,797 2,199 2,404 2,611 3,236 2,606 2,580 2,507 2,922 2,434 3,248 2,812 3,382 3,197 4,380 4,0361.) Design a questionnaire for consumer preference survey regarding the problem. Please keep in mind all aspects of the product, company, data analysis, etc. while designing the questionnaire. 2.) Pursuant to collection of data through the consumer preference survey regarding the product, please explain each step in your data analysis plan. Each step of the data analysis plan must be linked to the questions you have designed for the survey in the previous question. 3.) How would you conduct the survey? What would be your mode of data collection and sampling technique? How would you define the population and sample? Justify your answer.
- You want to provide an overview of the characteristics of the respondents in your sample. Which of the following would you use to provide insight in the age of your respondents? a. A frequency table and a bar chart b. The mode, median and the standard deviation c. The mean and the variance. d. The mean, the median, and the modeAs you know from the classes after you are done with the questionnaire, you have to sample the respondents before going for the fieldwork for data collection. Sampling can be done using nonprobability sampling or probability sampling. Which one in your opinion for pantene brand is deteriorating. Among these techniques, which one do you feel is the best sampling technique for your problem? Discuss with examples and justifications.A technique for the study of interrelationships among variables, usually for the purposes of data reduction and the discovery of underlying constructs or latent dimensions is known as: a. Factor Analysis b. Structural Model Analysis c. Multiple linear regression d. Reliability Analysis
- Which of the following involves a test of two-related samples? Multiple Choice Test of whether the mean salary of professors at Metro University is higher than the national average for university professors Test of differences in the percent of men and women who are or are not members of Greek organizations on campus Test of whether a change occurred in the proneness for heart disease among people who switched to a diet high in fish Test of the average incomes of subscribers of Southern Living and Better Homes and Gardens Test of differences in ad recall among three experimental groups (each of which saw a different advertisement) and a control group.Ten (10) different models from each of the five (5) randomly selected laptop brands were subjected to a study to know which brand on average has the longest battery life. a. Simple Random Sampling b. Systematic Sampling c. Stratified Sampling d. Cluster Samplingstate merits and demerits in collecting data of a questionnaires. Describe main aspects of a questionnaire