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According to ACT results from the 2008 ACT testing, the mean reading score was 21.4 with a standard deviation of 6.0. Assume that the scores are normally distributed.
What is the probability that a randomly selected student has a reading ACT score more than 30?
test 1answer the following three questions based on what you know about statistics now.1. what is statistics?2. how is
Assume that a 95% confidence interval estimate of the new annual starting salary is desired. How large a sample should be taken if we do not want to exceed $500? What do you know?
scores on a mathematics examination appear to follow a normal distribution with mean of 65 and standard deviation of
the system is released from rest with no slack in the cable and with the spring unstretched. determine the distance s
Consider the first-order model equation in three quantitative independent variables
Gestational Age (Gestage, weeks) for sample of 100 low birth weight infants, and output from fitting a simple linear regression model to data, regressing Headcirc (Y) on Gestage (X).
A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent. The pollster wishes to construct a p chart to see if the percentage favoring the incumbent candidate is too err..
Conduct a simulation to compare the various bootstrap con?dence interval methods. Let n = 50 and let T (F ) =( (x - µ)3dF (x)/σ3 be the skewness.
The maintenance cost is expected to be $0.1M for the first 5 years and will grow at an annual rate of 1% until the end of its 30-year service life. The cost of demolition is $1.5M and the demolished structure can be sold as scrap metal for $0.5M. ..
consider a set of test grades with a mean of 80 and a standard deviation of 3. use chebyshevs theorem to find the
using the empirical rule 95 of female heights should be between what two values? either show work or explain how your
the following regression equation y-bar 53.9 8.4x relates x the number of hours a student studies for a test and y
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