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Question: An IQ test. The Wechsler Adult Intelligence Scale (WAIS) is a common IQ test for adults. The distribution of WAIS scores for persons over 16 years of age is approximately Normal with mean 100 and standard deviation 15. Use the 68-95-99.7 rule to answer these questions.
(a) What is the probability that a randomly chosen individual has a WAIS score of 115 or higher?
(b) In what range do the scores of the middle 95% of the adult population lie?
if a company knows that its new employees have an eighty-five percent learning rate and the first time they perform the
A random sample of 80 students is selected for a particular study. What is the probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50?
In this problem we want to run a test of goodness of fit to check whether the coats in the consignment follow the indicated probabilities.
the data set in the accompanying table contains last months credit card purchases of 100 customers randomly chosen from
1. List the four steps of hypothesis testing, and explain the procedure and logic of each. 2. Based on the information given for the following studies, decide whether to reject the null hypothesis. Assume that all populations are normally distribut..
A 95% confidence interval for the mean amount of time spent on MySpace.com monthly has a lower bound of 151.4 minutes and an upper bound of 190.6 minutes.
your friends are in a local band and you help them promote upcoming concerts by passing out postcard-sized print ads.
Describe a simulation to estimate the probability of answering at least four of the ten questions correctly. carry out three repititons. estimate the probability
a batch of 500 machined parts contains 10 that do not conform to customer requirements. the random variable is the
Find, as Cardano did, the expected total without finding its distribution - Large prizes were given for large totals with a modest fee to play the game. Explain why this could be done.
Let X[k] be the location of a player after turns.-Describe the elements of the transition probability matrix, , for the monopoly Markov chain X[k].
Compute the ‘net' expected values for each product (i.e. expected value for its success minus expected value for its failure). Based on these ‘net' expected values, which product should the company pick?
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