Mathematics, 24.10.2019 17:43 bethanybowers4986
Astudy on the personality characteristics of drug dealers sampled 100 convicted drug dealers and scored them each on the wanting recognition? (wr) scale, which provides a quantitative measure of a? person's need for approval and sensitivity to social situations.? (higher scores indicate a greater need for? approval.) the sample of drug dealers had a mean wr score of 52? , with a standard deviation of 4. use this information to find an interval estimate of the mean wr score for all convicted drug dealers. use a confidence level of 90? %. interpret the result.
a.) the 90? % confidence interval for mean wr score indicates that the true mean wr score for convicted drug dealers is between and with 90% confidence.
b.) the 90? % confidence interval for mean wr score indicates that 90? % of convicted drug dealers have a wr score between and .
c.) the 90? % confidence interval for mean wr score indicates that the true mean wr score for all drug dealers is between and with 90% confidence.
d.) the 90? % confidence interval for mean wr score indicates that 90? % of all drug dealers have a wr score between and .
Answers: 2
![\large [\bar x-t^*\frac{s}{\sqrt n}, \bar x+t^*\frac{s}{\sqrt n}]](/tpl/images/0344/6493/12916.png)
is the sample mean 
is the value such that the area under the Student's t-distribution with 99 degrees of freedom (sample size -1) between ![\large [t^*, +t^*]](/tpl/images/0344/6493/45f09.png)
is 90% or 0.9
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Astudy on the personality characteristics of drug dealers sampled 100 convicted drug dealers and sco...
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