Answer the following a. problem b. null hypothesis c. statistical interpretation d. conclusion In one study, a researcher compared the level of job satisfaction of Generation X(born: 1965-1980) employees and Millennial (born: 1981-1996) employees in a job wherethe employees have to upgrade their IT (Information Technology) skills to cope with thedemands of working online this pandemic. The employees were asked to answer a jobsatisfaction survey with 1 as the lowest score and 10 as the highest score. The data areas follows:2.The means of each group with 20 participants each are:Generation X: X1 = 7.4Millennials: X2= 8.5The t value = 2.8751 and the critical values at @ .05 are +/- 2.1241.

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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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Statistics and Data Analysis
20. Which of the following is a null hypothesis? a. Pregnant women who drink cranberry juice will have lower urine bacterial counts than those who do not drink cranberry juice. b. The urine bacterial count of pregnant women who drink cranberry juice will be lower or equal to that of pregnant women who do not drink the juice. c. There will be a difference between ingestion of cranberry juice and among pregnant women who do and do not have high urine bacterial counts.
It is a claim about a population characteristic that is initially assumed to be true. A. Alternative hypothesis B. Null hypothesis C. One-tailed Test D. Two-tailed Test
Researchers wants to see if men have same blood pressure as women do. In the language of statistics, the most appropriate alternative hypothesis (H1) is that there is : O A. no difference between the population means. O B. a difference between the population means. O C. no difference between the sample means. D. None of these O E. a difference between the sample means.
Consider the following statements: I. As far as the probability of a Type I error is concerned, a two-tailed hypothesis test is more accurate than a one-tailed hypothesis test. II. A point estimation procedure in a one sample scenario utilizes information in a sample to arrive at two points, one positive and one negative in order to estimate the population parameter of interest. a. I and II are both true. b. I and II are both false. c. I is true and II is false. d. I is false and II is true. e. I is false and II is sometimes true.
2. Which one of the following statements is correct? A. If you are told a sample percentage is 25%, you would need to know the sample size in order to convert that percentage to a proportion. B. We always begin a hypothesis test by assuming that the alternative hypothesis is true. C. The test statistic is affected by the size of the sample. D. A small P-value means we have evidence in favor of the null hypothesis. E. The test statistic will be negative if the claimed population proportion is smaller than the sample proportion.
What is a null hypothesis? a. A hypothesis that states there is an effect or relationship in the population b. A hypothesis that states there is no effect or relationship in the population c. A hypothesis that is always rejected in hypothesis testing d. A hypothesis that supports the researcher's prediction
A formula that provides the evidence against a null hypothesis is called: A. Test-statistic B. Population statistic C. Both a and b D. Neither a or b
Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 23 people who drank ethanol and another group of 23 people given a placebo. The errors for the treatment group have a standard deviation of 2.40, and the errors for the placebo group have a standard deviation of 0.78. Assume that the two populations are normally distributed. Use a 0.05 significance level to test the claim that both groups have the same amount of variation among the errors. Let sample 1 be the sample with the larger sample variance, and let sample 2 be the sample with the smaller sample variance. What are the null and alternative hypotheses? OA. H₂:0² = 0²/2 OB. H₂:0² = 0²/2 H₁: 0²/12 #02/22 H₁:0² > 0²/2 ỌC Họỏi cơ OD. Ho: 0²/02/2 H₁:0² <0² H₁:0² = 0²/2 Identify the test statistic. (Round to two decimal places as needed.) Use technology to identify the P-value. (Round to three decimal places as needed.)
30
1
Which of the following would be an appropriate null hypothesis? A. The mean age of a sample is equal to 30. B. The mean age of a population is greater than 30. C. The mean age of a population is equal to 30. D. The mean age of a sample is greater than or equal to 30.

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