Define the Null Hypothesis and give an example
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Q: Which of the following could be an alternative hypothesis for a one-sample hypothesis test? Group of…
A: Which of the following could be an alternative hypothesis for a one-sample hypothesis test?
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Q: there is no statistically significant relationship between fear of crime and walking alone in your…
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A: It is needed to explain about the type I error.
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A: A hypothesis testing is sued to test the claim about the population parameter.
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A:
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1. Define the Null Hypothesis and give an example
2. Define the Alternative Hypothesis and give an example.
3. Explain what the following question means: “Does the evidence that we collected make our null hypothesis look ridiculous?”
4. Explain what the following statement means: “Statistics is the science of changing your mind under uncertainty.” Also, can statistics ever remove uncertainty?
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- Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ or p) for the indicated parameter.The mean college professors' salary is claimed to be over $80,300.You perform a two-sample hypothesis test to compare the proportions of two populations. You find that your p-value is greater than alpha. This means: Group of answer choices a.You have evidence that the population proportions are the same. b.You have evidence that the population proportions are different. c.You do not have evidence that the population proportions are different. d.You do not have evidence that the sample proportions are different.Which of the following is the first step in hypothesis testing? (a) Developing a null and alternative hypothesis. (b) Drawing a sample from the population. (c) It does not matter where you begin when you test hypotheses. (d) Setting the cutoff value for rejecting the null hypothesis.
- Explain this statement below in at least one paragraph 1. "Being a statistician is not having to be certain," "Uncertainty - something you can always count on," and "statistics: stability from variability" 2. What does specifying the null hypothesis and alternative hypothesis refer to? Why is it important to specify the hypotheses?In Chapter 17 Data Set 5, you will find entries for two variables: age category (young, middle-aged, and old) and strength following weight training (weak, moderate, and strong). Are these two factors independent of one another? Strength Weak Moderate Strong Age Young 12 18 22 Middle 20 22 20 Old 9 10 5 What is the null hypothesis in words? (You will need to get this from lecture and/or the lecture notes. It is not covered in your text). What is the alternative hypothesis in words? (See note in a. above) What is your degrees of freedom for the test? How did you arrive at this answer? Based on c. above and using an alpha =.05, what is the critical value for the test? Use PSPP/SPSS to calculate the Chi Square value. Use the instructions on pages 304-305. Copy/paste the output table. (result in the pictures) What is the Chi Square value? What is the p-value? Based on f., do…6. A sports analogy for hypothesis tests In recent years, professional sports have incorporated the use of instant replay in order to dispute questionable calls by the referees. For example, in the National Football League (NFL) a head coach is allowed to challenge the referees’ decision twice per game. In order for the referees to reverse their original decision, the instant replay must exhibit clear evidence to the contrary. Suppose the referees rule that a pass was caught in bounds. The head coach of the opposing team believes the player stepped out of bounds before completely catching the ball, and the coach challenges the referees’ decision. The referees will review all available evidence (video taken from different camera angles) and make a decision. If there is evidence beyond a reasonable doubt that their original call was incorrect, the play will be called an incomplete pass. However, if there is no clear evidence to contradict the original call, the play will remain…
- Suppose Connie owns a pet store in a large community that has over 50,000 pet owners. She believes that the proportion of men who own cats is different from the proportion of women who own cats. Connie decides to test this claim by performing a two-sample ?-test for two proportions. Her hypotheses are given by ?0:??=???1:??≠?? where ?0 is the null hypothesis, and ?1 is the alternative hypothesis. The variables ?? and ?? represents the population proportion of men and women cat owners, respectively. She randomly samples 420 men and 493 women who are pet owners in the community and finds that 234 men own cats and 256 women own cats. Determine the pooled sample proportion, ?̂. Provide your answer precise to three decimal places. Compute the standard error of the difference of the sample proportions (SE). Provide your answer precise to three decimal places. SE = ?̂=Part 1 You will be presented with several relationships and will be asked to write out the null and alternative hypotheses in the proper form. In this section you will: 1. Indicate the directionality of the relationship and what are being compared. Write the null hypothesis (remember, this is in terms of the population). 2. 3. Write the alternative hypothesis (remember, this is in terms of the samples). 1. A medical student is designing a clinical trial to test a new depression medication. The student believes the medication will reduce the severity of patient depression. 2. A researcher is running a study examining a new pilot training software using virtual reality technology. The researcher feels pilots trained using VR training program will perform differently than traditionally trained pilots during a simulated landing task. 3. A police officer believes younger drivers get ticketed more than older drivers. A researcher at a local university has decided to test the police officer's…Annie conducts a study to examine the differences in stress levels between pet owners and non-pet owners. She conducts a two-tailed test and tells that she rejected the null hypothesis. Therefore, which of these statements is true? Question 8 options: Pet owners have more stress than non-pet owners. Pet owners have less stress than non-pet owners. Pet owners' and non-pet owners' stress levels differ, but it is not known how they differ. Pet owners' and non-pet owners' stress levels do not differ.
- You are testing the difference between high school freshmen and seniors on SAT performance. The null hypothesis is that the population mean SAT score of the seniors is equal to the population mean SAT score of the freshmen. You randomly sample 20 students in each grade and have them take the SAT. You find that the sample mean of the seniors is significantly higher than the sample mean of the freshmen. Which alternative hypothesis is accepted? The population mean SAT score of the seniors is less than the population mean SAT score of the freshmen. The population mean SAT score of the seniors is greater than the population mean SAT score of the freshmen. You cannot be sure which alternative hypothesis to accept. You just know that the null hypothesis was rejectedMany questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test. Do a minority of Michigan residents clear snow from sidewalks before 9 am after snow has fallen?For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________High School Band - In most US high schools, students can play an instrument in three types of bands. A random sample of high school band students was taken and the results are summarized in the table below. Instrument type Band Woodwind Brass Percussion type Concert 31 25 8. Jazz 10 16 10 Marching 65 65 27 To assess whether there is a relationship between band type and instrument type, we want to conduct an appropriate hypothesis test. Choose the null and alternative hypothesis? 1. The categorical variables band type and instrument type are independent. Alternative hypothesis 2. The categorical variables band type and instrument type are not independent. Null hypothesis
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