Alexander Borbely is a professor at the University of Zurich Medical School, where he is director of the sleep laboratory. The histogram in the figure below is based on information from his bookSecrets of Sleep. The histogram displays hours of sleep per day for a random sample of 200 subjects. Estimate the mean hours of sleep, standard deviation of hours of sleep and coefficient ofvariation. (Enter x to 1 decimal place, s and CV to 2 decimal places.)CVFrequency8828908070605040302010%223.5 4.54225.5 6.5647.590 °8.51429.5 10.5Hours of sleep

Sample size, n = 200From histogram, the following data is being obtained:Hours of sleep(x)Frequency…

Answered: Alexander Borbely is a professor at the…

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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You take random sample of 200 people from Salinas and find that their average income is $48, 000 per ssalazar@stuce X year with a standard deviation of $9000. Also assume that population incomes are normally Email om sampile of 200 distributed. om sangle cf 200 X Approximately how many people make between $39,000 and $57,000? Uplead on sanple cf 200 X 200 O Cirf-I Answer format: Enter a positive integer Text
You may change one number in the table if needed to make it work x -2 2 4 1 P(x=x) 0.21 -0.03 0.32 0.18 Give a 2-decimal answer for each: Mean Variance Standard Deviation
Mason earned a score of 226 on Exam A that had a mean of 250 and a standard deviation of 40. He is about to take Exam B that has a mean of 550 and a standard deviation of 25. How well must Mason score on Exam B in order to do equivalently well as he did on Exam A? Assume that scores on each exam are normally distributed.
Aleks spins a 9 sided spinner 56 times. Each of the nine sides has a different colour on it. He records the number of times that he spins the colour purple. What values need to be determined in order to use a normal approximation? Determine these values.
Do question 1
We give the total variation, the unexplained variation (SSE), and the least squares point estimate b1 . Total variation = 13.459; SSE = 2.806; b1 = 2.6652 Click here for the Excel Data File Using the information given, find the explained variation, the simple coefficient of determination (r2), and the simple correlation coefficient (r). Interpret r2. (Round your answers to 3 decimal places. Round your percent to 1 decimal place.) Explained variation r2 r % of the variation in demand can be explained by variation in price differential.
Just do 2 and 3 please.
You wish to determine if there is a linear correlation between the age of a driver and the number of driver deaths. The following table represents the age of a driver and the number of driver deaths per 100,000. Use a significance level of 0.01 and round all values to 4 decimal places. Driver Age 65 69 48 37 49 27 62 64 Ho: p = 0 Ha: p = 0 r= Find the p-value p-value= Number of Driver Deaths per 100,000 22 22 34 Find the Linear Correlation Coefficient The p-value is Greater than a Less than (or equal to) a 23 28 20 The p-value leads to a decision to O Do Not Reject Ho O Accept Ho O Reject Ho 33 33 The conclusion is O There is a significant negative linear correlation between driver age and number of driver deaths. There is a significant linear correlation between driver age and number of driver deaths. O There is insufficient evidence to make a conclusion about the linear correlation between driver age and number of driver deaths. O There is a significant positive linear correlation…
The president of a school club would like to purchase T-shirts for members of the club and asks members which size they would like to order. The results are shown in the histogram below. T-Shirt Sizes 24 22 20 18 16 14 Small Medium Large Extra Large Size Which of the following is a true statement regarding the information shown in the histogram? O T-shirt size is a discrete quantitative variable. O T-shirt size is a continuous quantitative variable. O Frequency of each size is a discrete quantitative variable. O T-shirt size is a categorical variable. kouanbes
Given the scatter plot below, which of the following describes the strength and direction of the data? 10 Weak negative correlation Strong negative correlation Strong positive correlation Weak positive correlation

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