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Assume that you are expecting a medium effect size, α = 0.05, and a minimum power of 0.80. Your experiment utilizes three (3) groups. What is the required sample size (a priori)? How m
You conducted a Chi-Square Goodness of Fit Test in your ASCI 691 capstone project. Unfortunately, you did not get the sample size you had hoped for during your research. You were able to get 55 in t
What value of k will give the lowest expected number of tests that have to be performed? what is the expected number of tests?
In addition, Martinez has decided that there should be at least six ads on TV or radio or some combination of those two. The amount spent on billboards and newspapers together must not exceed the am
Use linear programming to determine how many units to produce in each month on regular time and on overtime to minimize the total cost while meeting the demands
You are interested to know if your shop in the suburbs has customers of the same age as your shop in the center of the city. Statistics of customer ages are: Suburbs: X= 38, s = 3.5, n = 19 City Ce
Compute the 95% confidence interval for the population mean. Round your answers to three decimal places. Write your answer using parentheses and a comma, in the form (n1,n2).
Suppose we know grades on final exam in a statistic course are normally distributed with a mean of 72 and standard deviation 15 so find the first,second, and third quartiles?
A treatment is administered to a sample selected from a population with a mean of mue = 80 and a standard deviation of 10. After treatment, the effect size is measured by computing Cohen's d, and a
Left-Handedness: Frank suggest that being a "south-paw" is gender-related. Test Frank's assertion at a 5% level test of significance. The data as are follows:
Bags of a certain brand of tortilla chips claim to have a net weight of 16 ounces. Net weights actually vary slightly from bag to bag and are Normally distributed with mean μ.
A representative of a consumer advocate group wishes to see if there is any evidence that the mean net weight is less than advertised and so intends to test the hypotheses
A study reports the results of a regression analysis based on n=15 observations in which x = filter application temperature and y=% efficiency of BOD removal. Calculated quantities include:
Estimate the true proportion of all such students who own a Texas Instruments calculator. Of the 9 students who owned a TI calculator, 4 had graphing calculators. Estimate the proportion of students
The probability that a person owns a car P(Car) = 0.80, that a person owns a boat P(Boat) = 0.30, and that a person owns both a car and a boat P(Car and Boat) = 0.12. Find the probability that a per
Consider a normal population with u=42 and standard deviation= 5.4. Calculate the z-score for an x bar of 49 from a sample of size 23. (Give your answer correct to two decimal places.)
What is the probability that a randomly chosen 10-card hand has exactly three three-of-a-kinds (and no four-of-a-kinds)?
Americans have become increasingly concerned about the rising cost of Medicare. In 1990, the average annual Medicare spending per enrollee was $3267; in 2003, the average annual Medicare spending pe
What is the probability that the time to detect the next pieces of debris is between 2.5 and 4.5 minutes? What is the median time to detection of debris?
If the average number of textbooks in a professor's offices is 16, the standard deviation is 5 and the average age of professors if 43, with a standard deviation of 8, which data set is more variabl
Consider the following. (Give your answers correct to two decimal places.) Determine the value of the confidence coefficient z(?/2) for 1 - ? = 0.83. Determine the value of the confidence coefficient
The distribution of the monthly costs does not follow the normal distribution. In fact, it is positively skewed. What is the probability of selecting a sample of 55 c to be at least $1,985 per month
The distribution of the monthly costs does not follow the normal distribution. In fact, it is positively skewed. What is the probability of selecting a sample of 55 one-bedroom apartments and findin
In order to accumulate enough money for a down payment on a house, a couple deposits $415 per month into an account paying 3% compounded monthly. If payments are made at the end of each period how m