Calculate the co-efficient of skewness based on Mean and Median from the followingdistribution :Class-IntervalFreqrency0-106.10-201220–302230-404840-505650-603260-701870-80

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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2.4
The following table shows the results of a survey of randomly selected residents of Mexico. Age 0-14 15-29 30-64 >64 Percentage 28 26 36 10 (a) Find the associated relative frequency distribution. HINT [See Quick Example 3.] 0-14 15-29 30-64 >64 (b) Find the relative frequency that a resident of Mexico is not from 15 to 64 years old.
Q2. A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours (each entry in the table is the number of sales per hour) 5 4 2 6 7 8 5 4 6 4 4 5 4 5 4 7 8 What are the mean, median, mode, variance and standard deviation of the sales?
A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per salesperson. The following list gives the monthly distances in miles driven by a random sample of 20 salespeople. 2310, 2083, 1914, 1890, 1920, 2507, 2594, 2448, 2642, 1928, 2505, 2190, 1894, 2048, 2247, 1853, 2079, 1870, 2621, 2320 Send data to calculator Based on this sample, find a 95% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthly driving distances are normally distributed. Give the lower limit and upper limit of the 95% confidence interval. 0 Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit: 5 P acer 6 Continue ! 1 q @ 2 W # 3 C e $ 4 r % 5 f t g 7 y S
State 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.
The following table displays the ages of female actors when they starred in their award-winning performances. Ages of Female Award Recipients 40 41 35 33 29 27 30 34 29 74 35 28 32 45 61 49 49 32 37 39 33 60 33 45 21 27 67 42 26 26 25 34 45 81 36 54 Find the mean and the median for the data in the table. (Round your mean to one decimal place.) mean median
For the following data set would you be more interested in looking at the mean median mode? State your Reasoning omode omean The Color of car preferred by american males • The preferred Colors are quantitare data with no outliers. o the preferred colors are qualitative of the preferred Colors are quantitive With outliers
Suppose the following data show the prices of 4 cars with similar characteristics that sold at a recent auction (in thousands of dollars): 5.7, 11.3, 10.4, 12.9. Calculate the mean selling price of the sample. (please express your answer using 2 decimal places)
the median of the following distribution: 10-14 15-19 16 20-24 12 25-29 4. TOTAL 40 O 20.00 O 17.00 O 14.50 O 18.25 Chek Save and Submit to save and submit. Click Save All Answers to sav

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Calculate the co-efficient of skewness based on Mean and Median from the following distribution : Class-Interval Freqrency 0-10 6. 10-20 12 20-30 22 30-40 48 40-50 56 50-60 32 60-70 18 70-80