A research done by a graduating studentreports that the average score of Universitystudents in statistics course is less than 80.To test this claim, a random sample of 10students was taken and their scores in thecourse are recorded as: 65,70, 80, 85, 60, 90,80, 75, 85, 90. What are the null andalternative hypotheses?Select the correct response:О Но: 3D 80, На: х > 80Но: и %3D 80, На: и 80Ο Ho: μ= 80, Ha: μ< 80O Ho: µ = 80, Ha: µ = 80

We want to find the null hypothesis and alternate hypothesis

Answered: A research done by a graduating student…

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 manufactures electrical components and today they are producing 220-ohm carbon film resistors. A sample of 8 resistors was taken from the production line and were tested. Below are the measured resistance of the 8 resistors. [220.8, 221.9, 223.2, 219.1, 222.8, 219.2, 219.4, 219.5] Consider the two-sided hypothesis test for the mean resistance: Ho : µ = 220 vs Hj : µ # 220 Calculate the test statistic for the observed data for this hypothesis test. Give your answer to 3 decimal places. Test statistic: to 3 d.p. What is your hypothesis decision given that the manufacturing company is happy with a 5% significance level of the test? Hypothesis Decision: (No answer given) You may use the following quantile values from the Student-t distribution: df 7 8 pt(0.900, df) 1.415 1.397 1.383 pt(0.950, df) 1.895 1.860 1.833 pt(0.975, df) 2.365 2.306 2.262
Researchers wanted to know if therapy could help smokers quit smoking. Of the 71 smokers they tested, 39 were smoking one year after treatment. Use a 0.05 significance level to test the claim that the majority are smoking one year after treatment. What is/are the critical value(s)? ттT Arial 3 (12pt) v TE -E · -
65 homeless people in San Jose were asked their age. The sample mean age was 33.2 years. Let x be a random variable representing ages of homeless people in San Jose. Assume that x has a normal distribution and o = 7.3 years. Do the data indicate that the mean age of the population of homeless people in San Jose is less than 35 years old? Use a = 0.05. Identify the following in your answer. 1. Identify the null hypothesis Ho and alternate hypotheses H, for the problem. 2. Identify the sample statistic, test statistic, p-value and calculator key used: Sample Statistic (sample mean) (Stated in problem) = Test Statistic (z) (Round to two decimal places) %3D P-value: (Round to four decimal places) = Calculator key used: 3. Identify the significance level and determine if you reject or fail to reject the null hypothesis. significance level = Do you reject or fail to reject Ho ? 4. State your conclusion. Upload your answer. Remember you can only upload one document. Upload Choose a File
4. In the ordered data: 20, a, 25, 30, 40, b, 49. If the first quartile=23.5 and IQR=19, then the values of a and b are: a=21.5, b=45.5 a=21, b=48 a=22, b=45 a=22.5 , b=45.5 5. Let X-Bin (12, 0.2), then * P (X 2 1) = O 1- 0.212 O 0.812 O1- 0.812 O 0.212
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this is only 1 question with some parts. please answer the whole parts!!!
A vehicle is advertised as having a gas mileage rating of at least 30 miles/gallon in highway driving. The miles per gallon obtained in 10 independent experiments are: 24, 25, 26, 20, 27, 25, 28, 26, 30, 33 For the null hypotheses µ ≥ 30, what is the significance level at which it can be accepted?
Please strictly provide explanation for item 13 and 15
A random sample of 10 independent healthy people showed the following body temperatures (in degrees Fahrenheit): 98.5, 98.2, 99.0, 96.3, 98.3, 98.7, 97.2, 99.1, 98.7, 97.2 Test the hypothesis that the population mean is not 98.6°F, using a significance level of 0.05.
Please solve these subparts of the attached image question manually and using R-studio code, not an excel output. Thanks so much! a) We want to test if there is a difference in the mean heart rates for the three groups. Give the null hypothesisof this test. b) Does the data suggest that there is a difference among the three groups? Use α = 0.05.c) If there seems to be a difference, complete a Bonferroni pairwise test to determine which or if all the meansare different from each other.
200 poodles 61 are left-paued left -pawed. a random sample of In a random sample ef 220 labradores 38 are Can we conclude that the difference in The tuo sample proportions of left pawed dogs is statistically significont for x= 0.05 ?

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