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- 9. In the city's entire commercial area, there has been a problem with shoplifting in the March-May months. A police cadet took a random sample of 10 days (out of the 90 days) and compiled the following data. For each day, x represents the number of police officers on duty in the commercial area and y represents the number of reported shopliftings on that day. 10 15 16 4 6. 18 12 14 y 1 6. 7 8. 3 a) Construct a scatter diagram of x and y values. b) Suppose the computed value of r is -0.969, what does the value tell you? 10. A psychologist is studying pattern-recognition skills under four laboratory settings. In each setting, a fourth-grade child is given a pattern-recognition test with 10 patterns to identify. In setting I, the child is given praise for each correct answer and no comment about wrong answers. In setting II, the child is given criticism for each wrong answer and no comment about correct answers. In setting III, the child is given no praise or criticism, but the observer…87) What is the mean of the data shown in the accompanying table? Scores Frequency (X) () 25 3 20 2 11 5 10 4 A) 11 B) 15 C) 14.5 D) 16
- What is the difference between Micro and M? a. Micro (u) is the variance and M is the mean b. Micro (u) i sthe median and M is the mean c.Micro (u) is the mean of the sample and M is the mean of the population d. Micro (u) is the mean of the population and M is the mean of the sampleWhat is Ha? (H0 is the mean VIQ scores for the younger, middle-aged, and older subjects are all not different from each other) (Note: 1= 5-25 Years, 2= 26-59 Years, 3= 60-92 Years) Multiple Choices: 1. H0 is not true 2. The mean VIQ scores for the younger, middle-aged, and older subjects 3. are all different 4. The mean VIQ scores for the younger, middle-aged, and older subjects are all different from each other 5. The mean VIQ scores for the younger, middle-aged, and older subjects are not equal to one another 6. The mean VIQ scores for the younger, middle-aged, and older subjects are not the same as each other1. Suppose the proportion of American adults who work at home is 40%. For a random sample of 100 American adults, what is the distribution of the sample proportion?
- Suppose that the variance of the sample mean is equals 25 and the sample size is 6 . then the population variance isAfter the measles outbreak, the barangay captain of Big Rock wanted to assess the satisfaction of the residents to his actions during the outbreak. He then obtained a random sample of 5 residents per block (Block 1 to Block 5) and asked them their satisfaction (1 - very dissatisfied, 2 - dissatisfied, 3 - satisfied, 4 - very satisfied). He wanted to know if the satisfaction of his residents differ from across blocks. 1. TRUE OR FALSE: We should test the normality of responses per blocks before we proceed with the test of hypothesis on comparing these responses across blocks. 2. The appropriate alternative hypothesis to compare satisfaction of residents across blocks is ____. ( See image for choices) 3. The appropriate test procedure to test the hypothesis is ___. A. T-test B. Z-test C. F-test using ANOVA D. Kruskal-Wallis Test E. None of the above5. To illustrate that s2 measures the spread, compute s2 for the two samples 109, 110, 111 and 105, 110, 115, and compare.
