4. (简答题, 8.0分)The number of credits being taken by a sample of 13 full-time college students for a semester are12,14,16,15,13,14,15,18,16,16,12,16,15(1)Caculate the mean, median and mode;(2)Caculate the sample variance and sample stadard deviation.

Measure of central tendency are used to measure the central values. Measure of central tendency are…

Answered: 4. (简答题, 8.0分) The number of credits…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A right skewed data set has a mean of 35 and a standard deviation of 25. What can be said about the amount of data contained within the interval (-15, 85)? 95% of the data is within this range 68% of the data is within this range Nothing At least 75% of data is within this range
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find the sample variance for the following data set using xi and (xi^2) 20.2, 21.8, 17.6 , 21.6 , 19.5 , 19.8 , 18.6
Roman, a health data officer, was tasked to create a report describing the height of all the children ages 12-15 years in a small town in Rome. He measured the height of all the 37 children (ages 12-15 years) in that small town. Describe the height using the following: Mean, Median and Mode Minimum and Maximum values Range Variance and Standard Deviation Coefficient of Variation 25th, 50th, and 75th Percentiles Interquartile Range Number of outliers
In an inter-school competition, there are a total of 14 participants. Each participant answered 20 multiple choice questions. Below are the numbers of correct answers obtained by the participants: 16, 11, 20, 19, 18, 17, 15, 16, 17, 19, 20, 17, 13, 13 (a) Find the mean, 90 th percentile, interquartile range, and standard deviation of the number of correct answers obtained by a participant. (b) Each participant has a basic score of 100 points. For each correct answer, 20 points would be given; for each wrong answer, 10 points would be deducted. Use X to represent the number of correct answers and Y to represent the final points of the participant, express Y as a linear function of X. (c) Find the following summary statistics of the final points a participant gets in this competition: Mean, standard deviation, interquartile range, maximum. (d) Write a simple summary report (in around 30 – 50 words) about the final points of a participant gets in this inter-school competition. (The…
The number of violent crimes committed in a day possesses a distribution with a mean of 2.1 crimes per day and a standard deviation of 5 crimes per day. A random sample of 100 days was observed, and the mean number of crimes for the sample was calculated. Describe the sampling distribution of the sample mean.

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4. (简答题, 8.0分) The number of credits being taken by a sample of 13 full-time college students for a semester are 12,14,16,15,13,14,15,18,16,16,12,16,15 (1)Caculate the mean, median and mode; (2)Caculate the sample variance and sample stadard deviation.