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A group of Brigham Young University-Idaho students (Matthew Herring, Nathan Spencer, Mark Walker, and Mark Steiner) collected data in November 2005 on the speed of vehicles traveling through a construction zone on a state highway, where the posted speed was 25 mph. The recorded speed (in mph) of 14 randomly selected vehicles is given below. You should be able to copy and paste them into Excel.1. Use Excel Data Analysis (PCs) or StatPlus (Macs) to find the mean, median, and mode of the data set.2. Assuming speeds are approximately normally distributed, use Data Analysis or StatPlus to construct a 95% confidence interval for the true mean speed of drivers in this construction zone. Interpret the interval. 3.Construct a 99% confidence interval for the true mean speed of drivers in this construction zone. Interpret the interval. 4.Compare the widths of the 95% and 99% confidence intervals.5.What conclusions do you draw about the speeds people drive in this construction zone?
Normal distribution on the population to estimate the value of the mean spending per day - estimate for the mean amount spent per day by a family of four visiting Niagara Falls.
Probabilities
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Calculate the expected value, variance, and standard deviation of the total income
Find the probability that exactly 5 rats have recessive traits and find the probability that no more than 9 rats have recessive traits.
a. Display these results in a table that best shows the association between cannibalism and the number of sneaking males. Identify the type of table you used.
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The following examples are experiments and their associated random variables. In each case identify the values the random variable can assume and state whether the random variable is discrete or continuous:
The sample average number of strokes being more than 5.0.
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