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Scores on a test are normally distibuted with a mean of 86 and a standard deviation of 7. What is the exam score corresponding to a standard score of -0.73?
Vocabulary scores of seventh-grade students. Figure 3.14 displays the scores of all 947 seventh-grade students in the public schools of Gary
in the game of parcheesi each player rolls a pair of dice on each turn. in order to begin the game you must throw a 5
Calculate a sample mean and standard deviation and then reject shipment if the sample average falls below some agree-upon value.
How many ways might there be in picking a small group of 6 people from a large group of 20 people?
The following table gives PX,Y (x, y), the joint probability mass function of random variables X and Y.
1 although crime rates in the u.s. are generally falling in the past much has been written about the relative
In a mobile phone shop on a Sunday morning, out of n = 77 customers x = 19 buy a mobile phone. What is the 95% confidence interval for the proportion of customers buying a mobile phone?
a sample of 51 observations has a mean of 98 and a standard deviation of 7. a second sample of 69 observations has a
representative data read from a plot on runoff sediment concentration for plots with varying amounts of grazing damage
Use a graphical technique to compare the divorce rates in 1992, 2008 and 2012 broken down by age for Australian Male. Describe your graph.
according to the national health and nutrition examination survey published by the national center for health
work out the mean, standard deviation and coefficient of variation for each set of results. comment on the accuracy and precision of your results
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