Which statistic is more resistant to outliers (extreme data values)? O Standard Deviation O Inter-quartile Range O Mode O Mean
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- Women N Mean Standard Deviation New Drug 40 38.88 3.97 Placebo 41 39.24 4.21 Men N Mean Standard Deviation New Drug 10 45.25 1.89 Placebo 9 39.06 2.22 There is no statistical difference between the new drug and the placebo in women. Is there a significant difference between the placebo and the new drug among men in this study? The pooled standard deviation is equal to 2.05. Please complete the 5 steps of hypothesis testing. Remember that the n of both groups is less than 30.Apply z-Scores 1) Listen A data set is normally distributed with a mean of 63 and a standard deviation of 10.4. What percentage of the data is between 45 and 77? Enter your answer as a number to the nearest whole percentage, like this: 42% Standard Normal Table GeoGebra Graphing Calculator Drovious ndc25h4ce97be3fa66/launch/9e7e69e7-c7a9-4ee1-aa1b-d43ce6c54699/assessment#Which are considered to be measures of central tendency? mean O standard deviation inter-quartile range range median mode O z-score maximum minimum
- z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?Detecting gypsy moths The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department places traps throughout the state to detect the moths. Each month, an SRS of 50 traps is inspected, the number of moths in each trap is recorded, and the mean number of moths is calculated. Based on years of data, the distribution of moth counts is discrete and strongly skewed with a mean of 0.5 and a standard deviation of 0.7. a. Explain why it is reasonable to use a Normal distribution to approximate the sampling distribution of for SRSS of size 50. b. Estimate the probability that the mean number of moths in a sample of size 50 is greater than or equal to 0.6. c. In a recent month, the mean number of moths in an SRS of size 50 was = 0.6. Based on this result, is there convincing evidence that the moth population is getting larger in this state? Explain your reasoning.The histogram below shows the ages (in years) of Honda Civic automobiles listed for sale on the Seattle Times Web site on November 26, 2003. 20 15 10 2 4 6 8 10 12 14 16 18 Age (years) Which of the following terms apply to this histogram? (Select all that apply.) O negatively skewed(to the left) O uniform O symmetric O bimodal O unimodal O positively skewed(to the right) Which measure of center is most appropriate for this data? O median O mean Which measure of spread is most appropriate for this data? O standard deviation M # of cars
- In a sampling distribution of means, variation is measured using what? OZ score Standard Error O Confidence Intervals O Mean of MeansAccording to the U.S. Census Bureau, the mean of the commute time to work for a resident of Baltimore comma Maryland Baltimore, Maryland is 30.8 minutes. Assume that the standard deviation of the commute time is 6.5 minutes to complete parts (a) through (c). Question content area bottom Part 1 (a) What minimum percentage of commuters in Baltimore Baltimore has a commute time within 2 standard deviations of the mean? enter your response here % (Round to one decimal place as needed.) Part 2 (b) What minimum percentage of commuters in Baltimore Baltimore has a commute time within 1.5 standard deviations of the mean? What are the commute times within 1.5 standard deviations of the mean? The minimum percentage of commuters in Baltimore Baltimore that has a commute time within 1.5 standard deviations of the mean is enter your response here %. (Round to one decimal place as needed.) Part 3 The commute times within 1.5 standard deviations of the mean are between enter your response here and…Explain the circumstances for which the interquartile range is the preferred measure of dispersion. What is an advantage that the standard deviation has over the interquartile range? Choose the correct answer below. A. The interquartile range is preferred when the data are bell shaped. An advantage of the standard deviation is that it increases as the dispersion of the data increases. B. The interquartile range is preferred when the distribution is symmetric. An advantage of the standard deviation is that it is resistant to extreme values. C. The interquartile range is preferred when the data are skewed or have outliers. An advantage of the standard deviation is that it uses all the observations in its computation. D. The interquartile range is preferred when the data are bell shaped. An advantage of the standard deviation is that it is resistant to extreme values. E. The interquartile range is preferred when the data are not skewed or no have…
