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You were interested in how long the average psychology major at your college studies per night, so you asked 10 psychology majors to tell you thee amountt they study. They told you the following times: 2, 1.5, 3,2,3.5,1, 0.5, 3, 2, 4. A) Find the 95% Confidence Interval on the population mean. B) Find the 90% Confidence Interval on the population mean.
Considering the four weights and assuming the weights are independent with a constant variance, obtain the least square weights of A and B.
You randomly select 40 cans and carefully measure the contents. The sample mean of the cans is 127.9 ounces. Does the machine need to be reset? Explain your reasoning.
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
The standard deviate of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year.
For each, draw the histogram of the sampling distribution of bar(y). Which sampling distribution has the smaller variance, and why?
The sums of squares were computed as SSW = 4773.3 and SSA = 591.2. Use the F test of ANOVA (assume α = 0.05) to decide whether or not there are any differences in true average lumen outputs between the three brands for this type of light bulb.
The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying
a random sample of 20 items is selected from a population. to determine the appropriate critical t-value what number
please write 50words on what the diagnosis is likely to be if a patient complains of one ankle and part of one foot
Is it possible to normalize the data when the population shape has a known skew? How would you demonstrate the central limit theorem to your classmates?
consider a data set in which all observations are equal. find the range variance and standard deviation for this data
A student decided that this is a binomial distribution problem. The student found that the probability of all four engines failing is 4.1E-09. Is that answer correct?
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