#5.22 Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.10 significance level for both parts. medium lead level Medium Lead Level High Lead Level72909285899783929811191 high lead level n2=11x overbar 2=90.273s2=9.693 test statistic P-Value conclusion consrtuct confidence interval suitable for testing the claim that mea IQ scores with medium lead higher than mean with high lead does confidenc interval support conclusion * I have asked this question multiple times with differnt numbers and each time the confidence interval that is given to me is always wrong i have wasted multiple questions because i get the answer but as i said it is always wrong im very frustrated because i am still unsure of how to do it because i end up wit hthe answer that i am given but it ends up being worng so hopefully someone can help me get it right*

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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#5.22

Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.10 significance level for both parts.

medium lead level

Medium Lead Level
High Lead Level
72
90
92
85
89
97
83
92
98
111
91

high lead level

n₂=11

x overbar 2=90.273

s₂=9.693

test statistic

P-Value

conclusion

consrtuct confidence interval suitable for testing the claim that mea IQ scores with medium lead higher than mean with high lead

does confidenc interval support conclusion

* I have asked this question multiple times with differnt numbers and each time the confidence interval that is given to me is always wrong i have wasted multiple questions because i get the answer but as i said it is always wrong im very frustrated because i am still unsure of how to do it because i end up wit hthe answer that i am given but it ends up being worng so hopefully someone can help me get it right*

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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