Identify and describe a type of reliability that measures participant reliability. Why is it useful
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Identify and describe a type of reliability that measures participant reliability. Why
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- Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (xx) Cost(yy) 957 148.98 624 100.36 869 137.66 281 40.34 259 39.26 579 82.06 309 52.26 485 83.9 797 113.58 338 54.32 911 138.54 A student calculates a linear modelyy = xx + . (Please show your answers to two decimal places)Use the model to estimate the cost when number of pages is 200.Cost = $ (Please show your answer to 2 decimal places.)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.Multiple Regression, Confidence Intervals, Reliability of Cost Formulas Randy Harris, controller, has been given the charge to implement an advanced cost management system. As part of this process, he needs to identify activity drivers for the activities of the firm. During the past four months, Randy has spent considerable effort identifying activities, their associated costs, and possible drivers for the activities' costs. Initially, Randy made his selections based on his own judgment using his experience and input from employees who perform the activities. Later, he used regression analysis to confirm his judgment. Randy prefers to use one driver per activity, provided that an R2 of at least 80 percent can be produced. Otherwise, multiple drivers will be used, based on evidence provided by multiple regression analysis. For example, the activity of inspecting finished goods produced an R2 of less than 80 percent for any single activity driver. Randy believes, however, that a…
- Bullying,” according to noted expert Dan Olweus, “poisons the educational environment and affects the learning of every child.” Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure anxiety in a group of bullies and a group of victims using an 18-item, 5-point anxiety scale. Assume scores on the anxiety scale are normally distributed and that the variances of the anxiety scores are the same among bullies and victims. The group of 23 bullies scored an average of 40.1 with a sample standard deviation of 10 on the anxiety scale. The group of 28 victims scored an average of 46.8 with a sample standard deviation of 11 on the same scale. You do not have any presupposed assumptions about whether bullies or victims will be more anxious, so you formulate…carefully weigh the data before casting your vote. As you review the data, you ask yourself, Assuming both teams handled roughly the same number of customers, which chart impresses me more? Which team is the most consistent? Which team, over time, has better average scores? Growing scores? Declining scores? What does the Descriptive Statistics ToolPak tell me about the data? Which team is showing improvement? Can I estimate (or visually predict using the best fit line) which team will have better future performance? If so, which team? How do I know? …and, for whom should I vote?Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages (xx) Cost(yy) 942 59.1 453 24.65 789 41.45 473 34.65 302 25.1 567 23.35 482 32.1 511 26.55 285 28.25 529 35.45 477 19.85 Click to Copy-and-Paste DataA student calculates a linear modelyy = xx + . (Please show your answers to two decimal places)Use the model above to estimate the cost when the number of pages is 736Cost = $ (Please show your answer to 2 decimal places.)
- Report an appropriate hypothesis test for a positive linear relationship and use a 5% significance level. Explain the potential error in words, in context. In the answer options below I have used the phrase “a certain relationship” because I don’t want to give away exactly what type of relationship it is. Group of answer choices We would be accepting that there was a certain relationship between Sale amount and Tip when actually there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when indeed there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when actually there was. We would be accepting that there was a certain relationship between Sale amount and Tip when indeed there was.Which is NOT an example of statistical bias? Response Bias Observer Effect Recall Bias Placebo EffectI will give a great review/rating! Thank you (:
- Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages (x) 445 304 721 666 383 794 706 745 904 916 Cost(y) 75.85 61.52 108.73 99.58 71.79 119.22 108.78 112.85 141.52 138.08 Click to Copy-and-Paste Data A student calculates a linear model y = to two decimal places) X + (Please show your answers Use the model above to estimate the cost when number of pages is 503 Cost = $ places.) (Please show your answer to 2 decimalPart 1: What is measured by the denominator of the z-score test statistic? Part 2: Which of the following is an accurate definition of a Type I error?Question content area top Part 1 A poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming. The results are given in the accompanying data table. Use a 0.01 significance level to test the claim that the sex of the respondent is independent of the choice for the cause of global warming. Do men and women appear to agree, or is there a substantial difference? Human activity Natural patterns Don't know Male 301 159 61 Female 298 138 63 Compute the test statistic. enter your response here (Round to three decimal places as needed.) Find the critical value(s). enter your response here (Round to three decimal places as needed. Use a comma to separate answers as needed.)
