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Question: Effects of class size Do smaller classes in elementary school really benefit students in areas such as scores on standardized tests, staying in school, and going on to college? We might do an observational study that compares students who happened to be in smaller and larger classes in their early school years. Identify a variable that may lead to confounding with the effects of small classes. Explain how confounding might occur.
the random variable x is normally distributed as xnmicro?2. it is known that px?660.03359 and px?810.1151a. give a
An understanding of statistics is necessary for any job. The use of statistics can help provide answers to many questions. Please, post a question you think that statistics may help you answer and explain why statistics can contribute to providin..
Madison has just burnt 15 songs onto a music mix CD, 5 are country, 5 are pop, and 5 are Disney songs. If she is interested in randomly listening to 3 songs, how many different combinations of songs can she listen to if order does not matter?
in usa today sept. 5 1996 the results of a survey involving the use of sleepwear while traveling were listed as
in a data communication system several messages that arrive at a node are bundled into a packet before they are
a bank classifies borrowers as high risk or low risk and 15 of ots loans are made to those in the high risk category.
A student has determined it takes an average of 16 minutes to drive from home, park the car, and get to class with a deviation of 4 so if it took the student 25 minutes what will the standard deviation be?
question assume that the mean systolic blood pressure of normal adults is 122 milliliters of mercury with a standard
Indicate the n and p for the Binomial setting and describe the steps taken to solve the problem.
We like to determine the current percentage of households using e-mail. How many households must be surveyed to be 90% confident that the sample percentage.
(i) Determine the number of days each probe is expected to last. (ii) If the reactor operator wishes to run a product campaign that lasts continuously for 20 days, determine the probability of running this campaign without having to replace the..
What type of error has possibly been committed? Explain the error in ordinary language.
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