A statistics professor claims that the average score on the Final Exam was 90. A group of students believesthat the average grade was lower than that. They wish to test the professor's claim at the a = 0.10 level ofsignificance. (Round your results to three decimal places)Which would be correct hypotheses for this test?Ο Ho: μ < 90, H1 : μ = 90O Ho:90, H₁:μ / 90Ο Ηo : μ = 90, Η: μ > 90O Ho:90, H₁:μ = 90O Ho: = 90, H₁:μ< 90A random sample of statistics students had the Final Exam scores shown below. Assuming that the testscores are normally distributed, use this sample to find the test statistic:Final Exam scores74 102 55 9258 92 989384 97 76 69675970 52test statistic:Give the P-value:Which is the correct result:O Do not Reject the Null HypothesisO Reject the Null HypothesisWhich would be the appropriate conclusion?There is not significant evidence to suggest that the average Final Exam score was less than 90There is significant evidence to suggest that the average Final exam score was less than 90

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Answered: h would be correct hypotheses for this…

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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а) Following is the information of two Companies in Oman in Ghala industrial Area Company Average Salary Standard Deviation No. of Workers X 22.5 OMR 3 500 Y 21.9 OMR 5 600 a. Which Factory Pays more wages? b. Which factory has more Variability in Wages?
a) Three confidence intervals were constructed using the same sample. Place these intervals in order from lowestconfidence to highest confidence: (17, 23) (14, 26) (18, 22)b) What was the sample mean of the data used to construct the intervals in part a?
What is wrong. In each of the following situations, identify what is wrong and then either explain why it is wrong or change the wording to make the statement true. b) The standard error of the sample mean is s^2/n c) A researcher wants to test H0: X with line on top = 30 versus the one - sided alternative Ha: X withb line on top < 30
The data referred to in this question were collected from several sales districts across the country. The data represent sales for a maker of asphalt roofing shingles. Information on the following variables is available: Sales Sales from last year in thousands of squares Expenditures Promotional expenditures in thousands of dollars Accounts Number of active accounts Competing Brands Number of competing brands producing equivalent or similar products District Potential A coded indicator of the potential of the district (higher score = better potential) Partial SPSS regression output of a multiple regression model with sales as the response variable and the other four variables as predictor variables is given below: ANOVA Sum of Model Squares df Mean Square F Sig. Regression 176777.1 4 44194.265 479.099 .000 Residual 1937.137 21 92.245 Total 178714.2 25 Coefficients Unstandardized Standardized Coefficients Coefficients Model Std. Error Beta t Sig. (Constant) Promotional Expenditures 1…
4) Suppose an x distribution with u = 12 and standard deviation 6. Consider two corresponding x distributions, the first based on sample size n = 36 and the second with sample size n = 64. a) What is the value of the mean and standard deviation of the two x distributions? First: Hx = Ox= - Ox=- Second: ux =
Q2) Independent-Samples t-Test (Round calculated results to the hundredth (2nd place to the right of the decimal)) In a research project, researchers collected demographic and health data from a sample of elderly residents in the community. To examine any possible gender differences in their sample, they want to see if the females and the males differ significantly on the education level (number of years of formal schooling). The researchers are not predicting any direction in the possible gender differences so the hypotheses should be non-directional. They would like to run a two-tailed test with α = .10. Male Subject ID Education Female Subject ID Education 1 14 13 14 2 15 14 15 3 17 15 18 4 13 16 18 5 15 17 16 6 15 18 17 7 13 19 16 8 15 20 16 9 15 21 17 10 16 22 15 11 17…
Determine whether the given value is a statistic or a parameter. 1) A sample of 120 employees of a company is selected, and the average age is found to be 37 years. A) Statistic 1) B) Parameter 2) After taking the first exam, 15 of the students dropped the class. A) Statistic 2) B) Parameter 3) After inspecting all of 55,000 kg of meat stored at the Wurst Sausage Company, it was found that 45,000 kg of the meat was spoiled. A) Parameter 3) B) Statistic 4) A health and fitness club surveys 40 randomly selected members and found that the average weight of those questioned is 157 lb. A) Parameter B) Statistic
39) Please answer Part A and B A) Using only the ten given bootstrap samples, construct an 80% confidence interval estimate of the mean weight change for the population. B) Using only the ten given bootstrap samples, construct an 80% confidence interval estimate of the standard deviation of the weight changes for the population.
A researcher is investigating whether a new fertilizer affects the yield of tomato plants. As part of an experiment, 20 plants will be randomly assigned the new fertilizer and 20 will be assigned the current fertilizer. The mean number of tomatoes produced per plant will be recorded for each fertilizer, and the difference in the sample means will be calculated. a)A matched-pairs tt-interval for a mean difference b)A two-sample tt-interval for a difference between sample means c)A two-sample tt-interval for a difference between population means d)A one-sample tt-interval for a sample mean e)A one-sample tt-interval for a population mean
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p = proportion of graduates who get a jobA published article indicates that only 1 in 3 university graduates have a job waiting for them. In an investigation of 200 recent graduates of university A, it was found that 51 had a job. Can it be concluded, with a level of significance of 0.01, that from this university the proportion of graduates who have a job is lower? Choose 1. the correct conclusion2. the correct interpretationSelect one: a) 1. H0 is rejected2. It can be ensured, with 99% confidence, that less than a third of the graduates of said university get a job. b) 1. H0 is not rejected2. It can be ensured, with 99% confidence, that less than a third of the graduates of said university get a job. c) 1. H0 is not rejected2. There is not enough evidence to consider, with 99% confidence, that less than a third of the graduates of said university get a job. d) 1. H0 is rejected2. There is not enough evidence to consider, with 99% confidence, that less than a third of the graduates of…

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