Scenario: Terry Teacher suspects that kindergarten class sizes in Alameda county are larger thanaverage. According to the California Department of Education, the average kindergarten class size inCalifornia is 21.9. For a random sample of 36 Alameda County kindergarten classes, the averageclass size was 23 with a standard deviation of two. Run a test to assess Terry Teacher's hypothesis atthe a=.05 level.Question: In symbols, the alternative, or research, hypothesis for this test would be:Ομ- 21.9Ομ# 21.9u = 23H 7 23

Answered: Image /qna-images/answer/119da16d-2c1a-4d16-a1eb-9cee8dbd43a7.jpg

Answered: Scenario: Terry Teacher suspects that…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A statement of “no difference” that contradicts the research hypothesis and is always expressed in terms of population parameters is called the a. null hypothesis. b. right-tailed test. c. t statistic. d. specified value
Which of the following is the correct p-value for this test?
Write your answers for this question on paper and then upload: From sampling 40 taxicab rides in New York City, a survey found that the mean cost of the taxi fare from the sample was $12.04. If the population standard deviation is $8.36, test the claim that the mean cost of a taxicab ride in New York City is less than $15.00. (a) State the null and alternative hypothesis. (b) By hand, find the test statistic z-score. Round to two decimal places. (c) Sketch the sampling distribution labeling the test statistic found in part (b) and compare it to the critical value z-score found in the previous question to make a decision to either reject or fail to reject the null hypothesis. Upload Choose a File
According to the College Board, scores on the math section of the SAT Reasoning college entrance test for the class of 2010 had a mean of 516 and a standard deviation of 116. Assume that they are roughly normal.One of the quartiles of the scores from the math section of the SAT Reasoning test is 438. The other quartile is _______.
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
A golf analyst claims that the standard deviation of the 18-hole scores for a golfer is less than 2.9 strokes. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. State the null hypothesis in words and in symbols. Choose the correct answer below. A. The null hypothesis expressed in words is, "the standard deviation of the 18-hole scores for a golfer is at least 2.9 strokes." The null hypothesis is expressed symbolically as, "H0: σ≥2.9." B. The null hypothesis expressed in words is, "the standard deviation of the 18-hole scores for a golfer is not 2.9 strokes." The null hypothesis is expressed symbolically as, "H0: σ≠2.9." C. The null hypothesis expressed in words is, "the standard deviation of the 18-hole scores for a golfer is less than 2.9 strokes." The null hypothesis is expressed symbolically as, "H0: σ<2.9." D. The null hypothesis expressed in…
Answer the given problem below by following in hypothesis testing. Sample problem: Determine the weight of the students before and during the quarantine. Did the students lose more fat before the quarantine? Weight before quarantine: sample mean = 5.9 kg sample standard deviation = 4.1 kg sample size = n = 42 standard error = SEM1 = 4.1/ √42 = 0.633 Weight during quarantine: sample mean = 4.1 kg sample standard deviation = 3.7 kg sample size = n = 47 standard error = SEM2 = 3.7/ √47 = 0.540 measure of variability = sq root [(0.633)2 + (0.540)2] = 0.83 1. Determine the p-value = 0.03 (LOS= 95%; α=0.05) 2. Make a decision 3. Conclusion
The average starting salary of students who graduated from colleges of Business in 2009 was $48,800. A sample of 100 graduates of 2010 showed an average starting salary of $50,000. Assume the standard deviation of the population is known to be $7000. We want to determine whether or not there has been a significant increase in the starting salaries. a. State the null and alternative hypotheses to be tested. b. Compute the test statistic. c. The null hypothesis is to be tested at the 5% level of significance. Determine the critical value for this test. d. What do you conclude from the test? e. What does the test result mean in the context of this problem?
The admitting office at Sisters of Mercy Hospital wants to be able to inform patients of the average level of expenses they can expect per day. Historically, the average has been approximately $1190. The office would like to know if there is evidence of a decrease in the average daily billing. Seventy-two randomly selected patients have an average daily charge of $1164 with a standard deviation of $276. Conduct a hypothesis test to determine whether there is evidence that average Step 1 of 3 : State the null and alternative hypotheses for the test. Fill in the blank below.
a. if the null hypothesis is true (avg. anxiety level score of children in the sample is the same as the avg. nationwide score; mu = 100), what can you say about the distribution of x-bar among simple random samples of 46 children? b. calculate the p-value on this distribution. given the p-value, what conclusions can you draw?
An educational researcher claims that the average GPA of graduate students at FIU is less than 3.5 . To test his claim he collected data on 81 graduate students . The sample mean GPA was 3.25 with a standard deviation of 0.3 . What is the conclusion ? Group of answer choices A. Reject the null hypothesis B. Type I error C. Fail to reject the null hypothesis D. Reject the alternative hypothesis
Suppose your null hypothesis is that engineering majors earn more than $80,000. Further, researchers collect and analyze sample data that leads them to fail to reject this null hypothesis. However, in the population, it is true that engineering majors earn less than $80,000. What would we call this error? a. Type I error b. Type II error c. No error occured d. Error equal to the level of significance

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