A sample of size 8 was collected from an unknown population01126 10 11 201. Use the table of expected z-scores (rounded to the nearest tenth) below to construct the normality plotwith expected z-scores on the x-axis and the observations on the y-axis:5-1.2-0.500.51.2Clear All Draw:22-2not normalnormal19#6-1.3-0.6-0.20.20.61.37-1.4-0.8-0.400.40.81.48-1.4-0.9-0.5-0.20.20.50.91.49-1.5-0.9-0.6-0.300.30.60.91.52. Based on whether the pattern above is linear or not, in your opinion, was the sample drawn from anormal population or not?

Answered: A sample of size 8 was collected from…

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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A sample of size 6 was collected from an unknown population 17 18 19 19 21 21 1. Use the table of expected z-scores (rounded to the nearest tenth) below to construct the normality plot with expected z-scores on the x-axis and the observations on the y-axis: 5 -1.2 -0.5 0 0.5 1.2 -2 AN M 22 not normal normal 21 20 19 18 Clear All Draw: 17- 16 + 6 -1.3 -0.6 -0.2 0.2 0.6 1.3 1 7 -1.4 -0.8 -0.4 0 0.4 0.8 1.4 8 -1.4 -0.9 -0.5 -0.2 0.2 0.5 0.9 1.4 9 -1.5 -0.9 -0.6 -0.3 0 0.3 0.6 0.9 1.5 2. Based on whether the pattern above is linear or not, in your opinion, was the sample drawn from a normal population or not?
Is the difference between the mean annual salaries of statisticians in Region 1 and Region 2 more than $8000? To decide, you select a random sample of statisticians from each region. The results of each survey are shown to the right. At a = 0.10, what should you conclude? Region 1 X1 = $67,900 01 = $8750 n1 = 43 Region 2 X2 = $60,000 02 = $9125 %3D %3D n2 = 41 Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Ha: H1 - H2 8000 Ha: H1 - H2 5 8000 F. Ho: H1 - H2 8000 O E. Ho: H1 - H2 > 8000 Ha: H1 - H2 3 2 8000 Determine the critical value(s). Zo = 1.28 (Round to two decimal places as needed. Use a comma to separate answers as needed.) Determine the rejection region. Select the correct choice below, and, if necessary, fill in any answer boxes to complete your choice. (Round to two decimal places as needed.) z> 1.28 В. z O C. z< Calculate the standardized test statistic for u, - H2. (Round to two…
28 What is the mean of the data set? * X X X X X X X X ++++++ 4 5 6 7 8 9 10 Number of miles run 8 XX O O
Consider the following data: x 6 7 8 9 10 P(X = x) 0.1 0.3 0.1 0.1 0.4 Step 2 of 5: Find the variance. Round your answer to one decimal place.
In the past Grades (G) of the police academy entrance exams in NYC was distributed normal with mean 66.5 and variance 100, G N(66.5, 100). Grades of 200 job applicants who took the test recently are distributed as follows: Grade: Under 49.5 49.5-59.5 59.5-69.5 69.5-79.5 79.5 and over Frequency: 22 38 56 50 34 Determine whether this data came from a normal distribution with mean 66.5 and variance of 100.
Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal distribution. Let x denote the amount of this pollutant emitted (in parts per billion) by a randomly selected vehicle. Suppose the distribution of x can be described by a normal distribution with ? = 1.8 and ? = 0.4. A city wants to offer some sort of incentive to get the worst polluters off the road. What emission levels constitute the worst 10% of the vehicles? (Round your answer to four decimal places.)
A sample of human brain volumes (cm³) is given below. Use the given data values to identify the corresponding z scores that are used for a normal quantile plot, then identify the coordinates of each point in the normal quantile plot. Construct the normal quantile plot, then determine whether the data appear to be from a population with a normal distribution. 1042 1078 1085 1076 1054 List the z scores for the normal quantile plot. 1.1.1.1.1.1. (Round to two decimal places as needed. Use ascending order.) 1435 1085 951
estion 3 of 38 university and gathers their freshman year GPA data and the high school SAI score reported on each of their college applications. He produces a scatterplot with SAT scores on the horizontal axis and GPA on the vertical axis. The data has a linear correlation coefficient of 0.506701. Additional sample statistics are summarized in the table below. Variable Sample Sample standard Variable description mean deviation high school SAT score x 1504.291401 Sx = 105.782904 %3D y freshman year GPA y = 3.240805 Sy = 0.441205 r = 0.506701 slope 0.002113 Determine the y-intercept, a, of the least-squares regression line for this data. Give your answer precise to at least four decimal places. tems of use Thelp about us குசங் careers 2:30 PM 10/24/20 o耳国 @ hp
Tiffany is a manager who needs to fire the worst performing 3% of employees. At her organization, employee performance is a normally distributed variable. Tiffany should fire employees who have a performance score that correspond with a z-score less than or equal to _____
Because most data values are on the left, we would say that this dot plot (burglary rates per 100,000 persons in 350 U.S. cities) shows a distribution that is skewed to the left (negatively skewed). 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 Bugry True or False True False ation 83% Type here to search P.
Consider the following passage: I ran a regression, with many variables to predict the result of another variable which was the murder rate. One can see that lots of things, can cause the murder rate to increase or decrease. I tried to account for all the important factors, and those factors are the SAT scores, unemployment rate, and international migration per 1,000. The SAT score is, average combined total score participants did on the SAT exam. The unemployment rate is, "a measure of the prevalence of unemployment and it is calculated as a percentage by dividing the number of unemployed individuals by all individuals currently in the labor force." (Wikipedia) International migration per 1,000 is, the number of people who come into a state from other countries per 1,000 people who live in the state. After I run the regression I will look at the t scores and p values and I should hopefully conclude that international migration does not cause crime. Which writing mistakes, if any, did…
for the following sample of scores that represents a continuous variable, calculate the range and interquartile range. Then compute the SS, variance, and standard deviation. scores: 7,9,1,3.

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