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A teacher finds that the scores of a particularly difficult test were normally distributed with a mean of 76 and standard deviation of 14. If a score of below 60 represents a grade of F, what percent of students failed the test? how many points must be added to the students' score so that only 5% fail?
we have random variables ybar sample mean and w the sample variance for the sample size of n2 from the distriubitony
Solve the problem using the graphical solution procedure. Find out the optimal percentage allocations and the optimal total portfolio return
Draw a scatter diagram and consider the correlation for the provided data. Do larger universities tend to have more property crime.
assume that the paired data came from a population that is normally distributed. using a 0.05 significance level find
each of 12 refrigerators of a certain type have been returned to the distributor because of loud noise. suppose that 7
I work in Aerospace Engineering. Aerospace components are often subjected to cyclic loads and can fail in "fatigue". The designers design the parts against fatigue failures using the "fatigue life" of the materials, typically obtained by testing the ..
the teacher ratio is 125. currently the school district has 3150 students. if the student enrollment increases by 20
Construct a 95% confidence interval estimate of the population mean life of the light bulbs.
Your friend is taking an algebra class that began one week after ours. Explain to your friend how to graph linear inequalities with two variables. Include at least two examples.
using a 5 level of significance and a sample size of 26 what is the critical value for a one-tailed hypothesis
discuss why the f-test and not the t-test is used in conducting the global test of coefficient in a multiple regression
suppose we draw 13 cards out of a deck of 52. what is the expected value of the number of aces we
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