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A high school decides to add a new course that prepares randomly selected seniors to take a certain standardized test, in the hopes of raising their scores. The mean score of the overall population of high school seniros is known to be 455 with a standard deviation of 100. the mean score for thsoe who took the course was 500. Compute the effect size of the new preparatory course?
in random samples of 12 from each tow normal population we found the following statisticsx1oline 74nbspnbspnbspnbsp s1
What is the probability that the student is both a sophomore and a history major?
A window is in the shape of a square of side s, witha semicircle of diameter s above it. Please help me unable to figure out how to write a function that express the total area of the window as a function of s
Assume the probability that a person has the desease is 0.03 for all people, independently of each other, and compute the expected number of tests necessary for each group.
Assume that 5% of men and only .25% of women are colorblind. A colorblind person is chosen at random:
In a sample of 1200 police officers, the mean annual salary was $33,000 and the standard deviation was $3200. A random sample of size 70 is drawn from this population. What is the probability that the mean annual salary is between $32,000 and $32,..
Assume a linear relationship, use the least square method to find the regression coefficients bo and b1 and Predict the mean kilowatt usage when the average temperature is 50 degrees Fahrenheit.
Find the probability of a type I error α if the true proportion is p=0.6.
Sugar in Cereal. Different cereals are randomly selected, and the sugar content (grams of sugar per gram of cereal) is obtained for each cereal
Determine standardized test statistic z and its corresponding area. If convenient use technology. z=( ) round to two decimals. Area= ( ).
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range.
assume that adults have iq scoresthat are normally distributed with a mean of 100 and a standard deviation of 15 as on
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