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1. Given a data set, describe how the shape of the distribution can give us hints about the mean, variance and standard deviation
2. Consider a left skewed distribution, and a normal distribution with the same n value. Which has a higher mean, which has a higher variance, and which has a higher median? For each explain how you know this.
There is no actual data set that goes along with question 1.
the caffeine content of red bull energy drink is a normally distributed random variable with a mean of 80 mg and a
a manufacturer claims that the batteries it makes will last 18 hours with a standard deviation of 1.5 hours. if the
If Okanagan declares a one-for-five reverse stock split, how many shares are outstanding now?
We are testing someone who claims to have ESP by having that person predict whether a coin will come up heads or tails.
Sat verbal scores are normally distributed with a mean of 426 and a standard deviation of 94. Use the Empirical Rule to determine what percent of the scores lie between 332 and 426.
We want to test the hypothesis that population B has a smaller variance than population A.
At the 0.10 level, is the recommended action independent of the inspector? Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?
When constructing your decision tree, you can reuse the EMV for the outcome after the decision to not hire the consulting team.
A group of employees at a large factory was asked to indicate their preference for one of two pension schemes. The table below gives the responses of three different categories of employees at the factory.
Compute descriptive statistics for TIME, PAGES VIEWED, and AMOUNT SPENT [Hint: Use the DATA ANALYSIS tool in Excel; choose DESCRIPTIVE STATISTICS.
Name two measures of the center of a distribution, and state the conditions under which each is preferred for describing the typical value of a single data set.
a random sample has been taken from a normal distribution. output from a software package is given belowvariable xn
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