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On the survey completed at the start of term, we asked students if they are right handed, left handed or ambidextrous. In a random sample
On the survey completed at the start of term, we asked students if they are right handed, left handed or ambidextrous. In a random sample of 125 students, 11 of them were left-handed. Note that parts of this question require you to use the critical value (Z*) for a given level of confidence. These values can be found from Table Z, however in the interest of time for this lab, you will be using one of the following values: Confidence Level 90% 95% 98% 99% Critical Value 1.645 1.960 2.326 2.576 Is a normal model appropriate for this sampling distribution? We know that the Independence Assumption is met, since the Randomization Condition is met. The sample of 125 intro stats students is a simple random sample (SRS) selected from the population of all intro stats students this term.Calculate a 98% confidence interval. Round your final answer to 3 places after the decimal, and leave your answer in decimal form to enter your answer below. Note that we are not asking for you to show your work, so you may use Software. However, you need to indicate the Z* used, as well as the margin of error. If you are using software, be sure you know how to calculate the interval by hand. Z* = Margin of Error = Interval: Interpret your interval in the context of the problem. A BI What does "98% confidence" mean in the context of this question? Note: we are looking for a definition here, not an interpretation. This is not the same as the previous question. 7 A BIBE How large a sample would we need to take if we wished to maintain a 98% level of confidence and have a margin of error of 4%? You may use the sample above as a pilot study
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