MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- Which, if any, of the observations are outliers? Justify your answer please!arrow_forwardBecause most data vaules are on the left of a graph, we would say that a dot plot shows a distribution that is skewed to the left? it will be true correctarrow_forwardThe proportion of a in the tail of a gold distribution can be never be more than .50 true or falsearrow_forward
- Suppose that, at the end of last semester, Marie gave her introductory statistics class a final exam. After grading these exams, she created a histogram illustrating the distribution of exam scores for the 70 students in the class. Each of the bars in this histogram includes only the left endpoint of the interval, except for the bar representing scores between 90 and 100 points, which also includes the right endpoint. What percentage of students scored between 60 and 80 points on the exam? Round your answer to the nearest tenth of a percent. Number of students who scored at least 80 points = students Percentage of students who scored between 60 and 80 points = %arrow_forwardSuppose you have a distribution with a mean equal to 10, median equal to 20, and mode equal to 30. Positive skew, negative skew, or no skew?arrow_forwardWhen the mean and median are equal, what can be said about the shape of the distribution? a. More information should be presented if assumptions pertaining to the shape of the distribution are to be made b. When the mean is equal to the median, the shape of the distribution tends to be slightly skewed right c. When the mean is equal to the median, the shape of the distribution can be assumed relatively symmetrical d. When the mean is equal to the median, the shape of the distribution tends to be slightly skewed leftarrow_forward
- A teacher has 10 students in her class. She collected the finishing time (in minutes) of the mathematics testfor all students:20 24 22 32 23 25 37 26 40 35(a) Find the 25th percentile and 75th percentile of the data. (b) Find the median of the data. (c) Find the range and interquartile range of the data (d) Comment on the skewness of the data with a reason.arrow_forwardState whether you would expect this distribution to be symmetric, left-skewed, orright-skewed, and briefly explain: ages of people obtaining a driver’s license for the firsttime.arrow_forwardA research scientist wishes to test the claim that the mean number of children per classroom in California elementary school is less than 35. She selects a simple random sample of 29 California elementary school classrooms. She know nothing about the distribution of children in classrooms. Can she use the data to test her claim?arrow_forward
- This is for statistics. Find a study that would result in a collection of data that is skewed to the left, bimodal, and uniform.arrow_forwardIt is widely claimed that a histogram is skewed to the left when the median is greater than the mean and to the right when the median is less than the mean. But there are exceptions to this claim. Demonstrate this exception by creating a data set that has at least 15 samples and plot the histogram.arrow_forwardA shopper at a local supermarket has spent these amounts in his last eight trips to the store: $32.92, 14.14, 30.80, 28.34, 75.58, 36.33, 33.51, and 22.94. Which statement about deleting the amount spent of $75.58 is false? a. The median of this data set may be more representative of the mean. b. The value of the mean would be reduced by $5.89. c. The value of the mean would not change. d. The value of the mean would be greatly reduced.arrow_forward
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