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The verbal part of the graduate record exam has a mean (?) of 500 and a standard deviation (?) of 100. Use the normal distribution to answer the following questions:
a. If we wanted to select only students at or above the 90th percentile, what verbal GRE score would we use as a cutoff?
b. What verbal GRE score corresponds to a percentile rank of 15%? 55%?
c. What is the percentile rank of a verbal GRE score of 628? 350?
d. If we randomly selected 1500 students who had taken the verbal GRE, how many would we expect to score lower than 250? higher than 750?
Brain cancer is a rare disease. In any year there are about 3.1 cases per 100000 od population. Suppose a small medical insurance company has 150000 people on its books.
Three chips are then selected at random and without replacement from II. (a) What is the probability that all three are white?
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
conduct a hypothesis test to determine if the proportion of business students at bayview university who were involved
A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80 percent of the values will occur.
there are 7 seniors and 3 juniors in the statistics club and a team of 5 will be randomly selected to attend the joint
Explain why those rates may be more meaningful as a measure of change across time than the actual numbers of those events.
correlation and regressiondebate the following statement correlation means causation. determine whether this statement
Compare and contrast quantitative and qualitative research designs. Identify and discuss some advantages and disadvantages for each type of research.
orders for a tablet are summarized according to the choice of requested features. thirty percent of the orders require
Assuming for a moment that 35% of all Ralph's customers have a discount card, what is the probability of getting a sample proportion at least this big?
a bank wishes to estimate the mean credit card balance owed by its customers. the population standard deviation is
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