#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*

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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