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In a study of color perception, 330 men are tested, and 66 are found to have red/green color blindness. 1. p= 2. np= 3. n(1
In a study of color perception, 330 men are tested, and 66 are found to have red/green color blindness. 1. p= 2. np= 3. n(1 - P)= 4. Is np > 5? (yes or no) 5. Is n(1 - p) > 5? (yes or no) 6. The margin of error is Use a 88 % confidence level. Round z-values to 2 decimals. Round your margin of error to 3 decimals. 7. Construct a 88 % confidence interval for the proportion of men in general population who are color blind. Use your rounded values from above. Round your answer to 3 decimals. Lower Bound Upper Bound 8. Identify the parameter the confidence interval is for. O $2 OH2 - H1 Of2 - 1 OH OPI - P2 OF1 - 12 OI OHI - H2 Op Op2 - P1 Op Os Op2 - P1 Op1 - P2Question 2 10 pts ) 1 0 Details In a survey, 14 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $11. Construct a confidence interval at a 98% confidence level. Give your answers to two decimal places for each part. You may carry the rounding down throughout the problem. 1. State the value of the estimate of the population mean. 2. Calculate value of the standard error. 3. Determine the value of z or t that you need to use for your confidence interval, and state it. 4. Calculate the margin of error for your interval 5. Calculate the 98% confidence interal. ? v 6. Interpret your confidence interval in the context of this problem.I Question 3 E.' 3 pts '5'.) 1 G) Details A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 696 margin of error at a 9?% confidence level, what size of sample is needed? Give your answer in whole people. ai State the value of 2 that you will use in your computation [rounded to 1 decimals}. In] State the value of n that you calculate from the formula {unrounded to 2 decimals]. Use the value from ci State the value of n that you would use for your sample size [rounded appropriately}
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