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1. Assume the IQ scores of the students at UNC has a normal distrib of 100 and standard deviation of 15.
(a) Find the proportion of students with the score
i. greater than 65.
ii. less than 72.
iii. between 60 and 80.
iv. greater than 71 or less than 61.
(b) Find the Q, and Q3 for the IQ score.
(c) Find the value with 95% of scores below it.
In a major industry where well over 100,000 manufacturing employees are represented by a single union, a simple random sampling of n = 100 union members.
In a small town in Alaska, there are 60 Republicans and 40 Democrats. Ten are selected at random for a council. What is the probability that there will be more Democrats on the council than Republicans?
Prepare an analysis of your selected article. Start by identifying and summarizing the hypothesis described in the article. Then explain whether the hypothesis was rejected or accepted, and what the implications of this finding are for the study.
What is the most important feature in the economic measure pursued by Allauddin Khilji?
This morning the office you are monitoring has eight office visits on the schedule. What is the probability that
Let x be a continuous random variable that is normally distributed with a mean of 26 and a standard deviation of 6
A pizza store chain wants to see which pizza toppings customers seem t olike the best. A random sample of people were asked about their pizza preferences.
The mean concentration was 1,249 ng/gm and the standard deviation was 145 ng/gm.
Compute the mean, median, mode and standard deviation for the following discrete probability distribution.
Hot dogs. Healthy eating probably doesn't include hot dogs, but if you are going to have one, you'd probably hope it's low in both calories and sodium.
Construct a 95% confidence interval estimate of the mean difference between the before and after scores. Write a statement that interprets the resulting confidence interval.
(a) What is the distribution of the random variable X - Y?
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