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Steel rods are manufactored with a mean length of 26 centimeter(cm). Because of variability in the manufactoring process, the lengths of the rods are approximately normally distributed with a standard deviation. What porportion of rods has a length less than 25.9cm?
Find a 90% confidence interval for the population mean weight of all such turtles.
construct a 95 confidence interval to estimate the population proportion with a sample proportion equal to 0.60 and a
the table below shows the political affiliation of randomly selected american voters and their positions on the school
If you choose 12 vehicles at random, what is the probability that more than half(that is, 7 or more) carry just one person?)create a probability distribution table and a cumulative distribution.
A professor asked her sophomore students, "How many drinks do you typically have per session? (A drink is defined as one 12oz beer, one 4oz glass of wine, or one 1oz shot of liquor.)"
A study on body types gave the following results: 45% were short; 25% were short and overweight; and 24% were tall and not overweight.
A confidence interval for the population mean tells us which values of mean are plausible (those inside the interval) and which values are not plausible (those outside the interval) at the chosen level of confidence.
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
To get a sense of the data, provide two well labeled scatter-plots of 1) revenue vs. budget, and 2) revenue vs. screens. Also, provide a correlation matrix of these three variables
If a class of 30 students is chosen at random from the university populaton, find the mean of the number of male students. Find the standard deviation of the number of male students.
1. if a uniform distribution and normal distribution both have the same mean and the same range the normal distribution
Solve the differential equation, 12y=by-4y' writing the solution as y as a function of x (isolating y).
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