Proof the empirical rule in detail and with an example
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Q: Using Appendix C-1 or Appendix C-2 find the p-value for each test statistic. (Round your answers to…
A: To calculate the p value.
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Q: Use the Internet or a newspaper or magazine to find an example of a claim made by a political or…
A: 1) One example of a claim made by a political group is the National Rifle Association (NRA) claiming…
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Q: Regression Statistics Multiple R 0.249479872 R Square 0.062240207 Adjusted R Square 0.052671229…
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A: Given: a) α=0.2 The test used is z test. It is left tailed test.
Q: Activity Challenging a Claim: Tests of Hypotheses Use the Internet or a newspaper or magazine to…
A: 1) One example of a claim made by a political group is the National Rifle Association (NRA) claiming…
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Q: A medical researcher says that less than 77% of adults in a certain country think that healthy…
A: Given information Claim: - Less than 77% of Adults in a certain country think that healthy children…
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A: Given: Group A: n=120 X¯1=62.7S1=2.5 Group B: n=150. X¯2=61.8S2=2.62
Q: How do you work this probl
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The objective is to prove the empirical rule and give an example.
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- Pseudoscorpions: Investigating the Research Question The data for this project is in data frame Pseudoscorpions, from package abd: require(abd)data(Pseudoscorpions)View(Pseudoscorpions)help(Pseudoscorpions) From the text Analysis of Biological Data, by Michael C. Whitlock and Dolph Schluter: Pseudoscorpions of the species Chordylochernes scorpioides live in tropical forests where they ride on the backs of harlequin beetles to reach rotting figs where they feed. Females of the species are promiscuous and mate with multiple males over short lifetimes. It is unclear what advantages there are for a female to mate multiple times, because the males don't help to care for her young, and mating just once provides all the sperm she needs to fertilize her eggs. One possible advantage is that the sperm of some males is genetically incompatible with a given female and, by mating multiple times, a female increases the chances of mating with at least one male whose sperm is compatible with her. To…true if the statement is absolutely true, otherwise answer false if the statement is either true or false one tailed test of hypothesis is a test where the alternative hypothesis specifies a one directional difference for the parameter of interestNumerical methods example
- t Test for TWO DEPENDENT (Related) SAMPLES (Show all work) A manufacturer of a gas additive claims that it improves gas mileage. A random sample of 40 drivers tests this claim by determining their gas mileage for a full tank of gas that contains the additive (X1) and for a full tank of gas that does not contain the additive (X2). The sample mean difference D-Bar equals 2.12 miles (in favor of the additive) and the estimated standard error equals 1.50 miles. Test the Null Hypothesis with t, using the .05 Level of significance and construct a 95 percent confidence interval (whether you reject OR retain the Null Hypothesis)Question Help A research center claims that 31% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 800 adults in that country, 34% say that they would travel into space on a commercial flight if they could afford it. At a = 0.10, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. At least % of adults in the country would travel into space on a commercial flight if they could afford it. OB. 31 % of adults in the country would travel into space on a commercial flight if they could afford it. %. O C. The percentage adults in the country who would travel into space on a commercial flight if they could afford it is not O D. No more than % of adults in the…Testing Hypothesis A medical researcher says that less than 25% of Filipino adults are smokers. In a random sample of 200 Filipino adults, 19.3% say that they are smokers. At a = 0.05, what is the decision on its hypothesis? O Reject null hypothesis O Fail to reject null hypothesis
- Activity Challenging a Claim: Tests of Hypotheses Use the Internet or a newspaper or magazine to find an example of a claim made by a political or special-interest group about some char- acteristic (e.g., favor gun control) of the U.S. population. In this activity, you represent a rival group that believes the claim may be false. 1. In your example, what kinds of evidence might exist which i would cause one to suspect that the claim might be false and therefore worthy of a statistical study? Be specific. If the claim were false, how would consumers be hurt? 2. Describe what data are relevant and how that data might be collected. 3. Explain the steps necessary to reject the group's claim at level a. State the null and alternative hypotheses. If you reject the claim, does it mean that the claim is false? 4. If you reject the claim when the claim is actually true, what type of error has occurred? What is the probability of this error occurring? 5. If you were to file a lawsuit against the…Using Appendix C-1 or Appendix C-2 find the p-value for each test statistic. (Round your answers to 4 decimal places.) Test Statistic p-value (a) Right-tailed test z = +2.74 (b) Left-tailed test z=-2.63 (c) Two-tailed test z=-2.04High 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 conduct an appropriate hypothesis test. Based on the p-value that you calculated in the previous learning check question, which of the following describes the evidence to say that there is a relationship between band type and instrument type? Little evidence Some evidence Strong evidence
- Practice not gradedComputing the Z-test Statistic The State College is evaluating a new English composition course for freshmen. A random sample of n = 25 freshmen is selected from the State College. All 25 students are placed in the new English composition course during their first semester. One year later, a writing sample is obtained for each student and their writing samples are graded using a standardized evaluation technique. The average score for the sample is M= 76. For the general population of the State College, writing scores form a normal distribution with a mean = 70 and a standard deviation = 20. Please calculate the appropriate hypothesis test using all four steps?Can you please check check my work