**Question:**A sample of 33 lights in Austin gives an average of 46 cars/min while the city SD = 3.4. A sample of 34 Dallas lights gives a mean of 44 cars/min with the city SD = 1.4. At the 91% level, do the towns differ?1. Is the test: [_____] (A-Left Tailed, B-Right Tailed, C-2-Tailed)2. Critical Value: [_____] (separate with a comma if there are 2)3. Test statistic: [_____]4. 3-decimal p-Value: [_____]**Explanation:**This question involves hypothesis testing to determine if there is a significant difference between the average number of cars per minute at traffic lights in Austin and Dallas. The information provided includes sample sizes, means, and standard deviations for both cities. The test should be conducted at a 91% confidence level. Each blank should be filled with the appropriate values or choices based on statistical analysis methods.

Note: According to Bartleby guidelines expert solve only one question and maximum three subpart of…

Answered: A sample of 33 lights in Austin gives…

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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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
When the distance from the smallest observation to the 1st quartile is much greater than the distance from the 3rd quartile to the largest observation, the data set is most likely Two answers correct. 1. symmetrical. 2. nonsymmetrical. 3. skewed to the right. 4. skewed to the left. 5. not skewed.
PLEASE ONLY SELECT THE ANSWERS AS SHOWN FOR THE MULTIPLE CHOICE, SUCH AS OPTION 1, 2, ETC. 1) In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.8 and a standard deviation of 1.51. Use a 0.10 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? A. H0: μ=0 mg/dL H1: μ<0 mg/dL B. H0: μ>0 mg/dL H1: μ<0 mg/dL C. H0: μ=0 mg/dL H1: μ≠0 mg/dL D. H0: μ=0 mg/dL H1: μ>0 mg/dL…
A SAMPLE SIZE OF 36 WAS DRAWN AND ITS MEAN WAS FOUND TO BE 80. TEST WHETHER THIS SAMPLE COULD HAVE COME FROM A NORMAL POPULATION WITH MEAN 90 AND VARIANCE 225?
Warming and Ice Melt The average depth of theHudson Bay is 305 feet. Climatologists were interestedin seeing if the effects of warming and ice melt wereaffecting the water level. Fifty-five measurements overa period of weeks yielded a sample mean of 306.2 feet.The population variance is known to be 3.57. Can it beconcluded at the 0.05 level of significance that theaverage depth has increased? Is there evidence of whatcaused this to happen?
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 136 and a standard deviation of about 45. Assume forty-two individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. Find the third quartile for the average number of Facebook friends
Pennsylvania Refining Company is studying the relationship between the pump price of gasoline and the number of gallons sold. For a sample of 13 stations last Tuesday, the correlation was 0.61. 1. State the decision rule for 0.100 significance level. (Round your answer to 3 decimal places.)
Dr. Gomez conducted an experiment on studying alone vs. in a group. Twelve participants were randomly assigned to study a short chapter of a statistics test with either a group of students or alone. Twenty-four hours after the study session ended, the participants took an examination on the information in the chapter and the number of correct answers was recorded. Data from the experiment and the mean (X-bar) and standard deviation (SD) for each group are given below. Compute the difference between the means as the Alone minus Group Study Method. Study Method Alone (A) Group (G) X-barA = 445/6 = 74.167 SDA = 7.305 74 55 67 67 X-barG = 343/6 = 57.167 SDG= 6.646 87 55 77 47 68 59 72…
I need help finding the test statistic t (rounded to 2 decimal places) and the P-value (rounded to 3 decimal places). Thank you
A researcher wanted to know whether losing one night sleep can affect problem solving. A sample of n = 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep between the two tests. For each student, the difference between the first and the second score was recorded: MD = 5 and standard deviation of the difference score was s = 10. Do the data indicate a significant change in problem solving ability? Use a two-tailed test with α = .01. The alternative hypothesis in words is Group of answer choices Problem solving ability improves after losing on night sleep Problem solving ability is reduced after losing one night of sleep There is no significant difference in problem solving ability between the two conditions: before and after losing one night of sleep There is a significant difference in problem solving ability between the two conditions: before and after losing one night of…
Which score has a better relative position: a score of 65 on an exam with a mean of 80 and a standard deviation of 14 or a score of 69 on an exam with a mean of 82 and a standard deviation of 12?

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