MeanVarianceObservationsHypothesized Mean Differencedft StatP(T<=t) one-tailt Critical one-tailP(T<=t) two-tailt Critical two-tailOb. Decision rule: reject Ho if t > 2.898Store A30.86889.721Oc. Decision rule: reject Ho if t < -2.89810017Oa.a. Decision rule: reject Ho if t > 2.567 or t < -2.5670.7160.24182.5670.48362.898Od. Decision rule: reject Ho if t > 2.567Oe. Decision rule: reject Ho if t > 2.898 or t < -2,898Store B28.23254.93412

A hypothesis test is a statistical method used to make inferences or conclusions about a population…

Answered: Mean Variance Observations Hypothesized…

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 company would like to know if efficiency can be improved through a training course for employees. A sample of employees is taken. The time taken for an employee to complete a task before training and after training is observed. Mean Variance Observations Hypothesized Mean Difference df t Stat P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail Confidence Level Before n = 33.1 16.81 30 0 29 -2.282 0.051 -1.699 0.025 -2.045 95% After 31.7 12.25 30 p= Ex: 1.234: -3 -2 t = Ex: 1.234 Ex: 9 Degrees of freedom: df = Point estimate for before training: before Ex: 1.234 Point estimate for after training: after -1 0 1 2 3
Data of variable-A is collected as shown to the right. Is the mean of Variable-A less than 80? State null hypothesis and choose level of significance, a = 0.05. (Use Excel ttest function, provide clear logic and reasoning.) Variable-A Variable-B 78.8 81.9 76.9 78.0 67.8 69.7 68.9 74.7 70.5 70.0 80.0 68.2 63.0 88.7 78.7 86.7 85.4 69.5 87.0 75.1 82.4 71.8 78.2 58.1 76.9 74.8 60.2 93.2 82.6 84.6 67.2 66.5 71.7 77.2 68.9 74.0 69.3 77.7 89.1 78.6 76.3 68.3 74.0 89.0 69.4 82.1 76.3 78.0 66.2 80.3 73.9 82.4 79.1 83.1 80.4 66.4 66.2 67.6 80.9 75.3
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need with bell shape curve that shows are shaded and weve been doing the square root and sample distribution with them
Shoulder height is known to be normally distributed with a mean of 56.65 inches for males and 52.5 inches for females. The males vary with a standard deviation of 2.46 inches and females at 2.49 inches. find the z-score representing a male whose shoulder height is 49 inches a standardized curve N(0,1) is shown below use this information to find an equivalent shoulder height for females and explain the relevance of this value and shading in the context of the problem
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Range Mean Absolute Deviatio Sample Standar d. Deviatio Sample Variance
Integrate x2 between -1 and 3 between using both the stone throwing approach and the mean value approach. For m=1 & N=1000, what do you observe if you plot N vs calculated value of the function for both methods? For N=102, 103,104, 105, 106 and m=16 plot the N vs absolute error for both methods. What relationship fits this distribution of points? Comment on what you observe Now plot N against the Standard Deviation (the Variance) for both methods and comment on what you observe.
Interpret the residuals, intercept and slope, Shapiro test and r squared value. Analysis and conclusions from evidence from the R data and graphs please.
es point(s) possible Workers at a certain soda drink factory collected data on the volumes (in ounces) of a simple random sample of 22 cans of the soda drink. Those volumes have a mean of 12.19 oz and a standard deviation of 0.14 oz, and they appear to be from a normally distributed population. If the workers want the filling process to work so that almost all cans have volumes between 11.98 oz and 12.70 oz, the range rule of thumb can be used to estimate that the standard deviation should be less than 0.18 oz. Use the sample data to test the claim that the population of volumes has a standard deviation less than 0.18 oz. Use a 0.05 significance level. Complete parts (a) through (d) below. b. Compute the test statistic. x²=0 (Round to three decimal places as needed.) c. Find the P-value. P-value= (Round to four decimal places as needed.) d. State the conclusion. the level of significance. There is evidence to conclude that the population Ho, because the P-value is standard deviation of…
Hi please answer this in order and encoded or written. Thanks.
Reading Pressure [mmH20] 397 1 2 398 397 7) Pressure values measured by various probes in the test section of a wind tunnel to obtain the freestream velocity have been given in the table below. The researcher who made the measurements concluded that the 8th reading 4 398 397 396 had a value of -3.625 as the "deviation from the mean" and eliminated the data 7 395 point based on the Chauvenet criterion. However, she later realized that she used the factor "1/n" instead of "1/(n-1)" in the calculation of standard deviation, which was used for data sets with a total number of data points less than 20. Find the value of the 8th reading and determine if the elimination is actually necessary. 8. ? 9 398 10 398 11 399 12 398 13 399 14 396 15 399 16 400

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