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1. For the following exercise, complete the following:
a. Find the mean, median, and range for each of the two data sets.
b. Find the standard deviation using the rule of thumb for each of the data sets.
c. Compare the two sets and describe what you discover.
The following data sets shows the ages of the first seven presidents (President Washington through President Jackson) and the seven most recent presidents including President Obama. Age is given at time of inauguration.
First 7: 57 61 57 57 58 57 61
Second 7: 61 52 69 64 46 54 47
Which of the following preference orderings, if any, could characterize his preferences? Tell me any/all that apply, and explain how you know this.
A survey of the opinions of property owners about a street widening project was taken to determine whether the resulting opinion was related to the distance of front footage.
Given that the sample mean is x¯=93.81, and the sample standard deviation is s=4.65, determine if there are any outliers. (We will define an outlier to be any data value outside of the x¯+_2s range.)
What size random sample should you take if you want to estimate the annual salary in the population with 99 percent confidence and a maximum margin of error of $250?
Rewrite the equation in slope-intercept form. Then identify the slope and the y-intercept of the line.
The claim that ""40% of those persons who retired from an industrial job before the age of 60 would return to work if a suitable job was available" is to be investigated at the 0.02 level of risk.
The quality-control inspector checks 200 pieces in a certain operation. The piece is either good or defective. The record for nine hours.
Election officials take a random sample of 100 signatures and thoroughly investigate them to find that 84% are valid. Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
What type of probability distribution is appropriate for this problem? Determine the probability of getting no calls between eight and nine in the morning. Calculate the probability of getting exactly five calls between eight and nine in the morning
The probability distribution for the possible results of an experiment is given, Determine the mean of the distribution.
A fastener manufacturing company uses a chi-square goodness of fit test to determine if a population of all lengths of ¼ inch bolts it manufactures is distributed according to a normal distribution.
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