#5.2 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. Medium Lead Level 7299928580978392 97 111 91 high lead levels n2=11 xoverbar 2 =90.182 s2= 10.507 test statistic P-Value conclusion of test construct a confidence interval suitable for testing the claim that the mean IQ sores for subjects with medium lead levels is higher thn the mean for subjects with high lead levels. does the confidence interval support the conclusion
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
#5.2
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
Medium Lead Level
72
99
92
85
80
97
83
92
97
111
91
high lead levels
n2=11
xoverbar 2 =90.182
s2= 10.507
test statistic
P-Value
conclusion of test
construct a confidence interval suitable for testing the claim that the mean IQ sores for subjects with medium lead levels is higher thn the mean for subjects with high lead levels.
does the confidence interval support the conclusion
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