Please complete the two tests (about fair coins and gender selection) provided in class. If you were absent or lost yours, I've provided the contexts below. (Make sure you complete all four steps for each problem!)
1. Write Hypotheses
2. Check Conditions
3. Do the math (use your calculator, then show the work!)
4. Write your conclusion
Tomorrow we'll work through some multiple choice questions in groups and complete a two tailed test.
Then its on to chapter 21 Monday!
Tonight's HW:
1. Advances in medical care such as prenatal ultrasound examination now make it possible to determine a child’s sex early in pregnancy. Some fear that some cultures may use this to select their children’s gender. A study from Punjab, India reports that in 1993 in one hospital 56.9% of 550 live births were boys. Medically, male babies are slightly more common than females; for this region, our baseline is 51.7% male live births. Do you believe parents may be selecting gender?
2. You want to test if a coin is fair by examining the percent of heads that you see. You flip the coin 244 times, and it lands on heads 105 times. Is there statistical evidence to suggest that the coin is not fair? (*Two-tailed test*)
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