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1. At the certain university, average cost of books per student was 400.00 last semester. In the sample of 40 students this semsester, their average cost was 340.00 with standard deviation of 80.00. Dean of students thinks that costs are greater this semester. Determine the test value for this hypothesis
A) 15.00B) 2.37C) 0.38D) 0.75
2. Medical researcher is interested in whether patient's left arms or right arms are longer. if 14 patients participate in this study (so that n left arms and n right arms are estimated), how many degrees of freedom must researcher use in her t-test critical value suppose that variances are equal?
A) 13B) 27C) 14D)26
A study of 80 white mice showed that their average weight was 3.7 ounces. The standard deviation of the population is 0.6 ounces.
What is the treatment mean square? What is the mean square error? How many groups are included in the study?
Assume that the population of heights of treated plants is normally distributed with mean. Based on the sample, can it be concluded that is different from centimeters? Use the level of significance. Perform a two-tailed test. Then fill in the table..
Is there evidence of violations of the usual ANOVA assumptions of equal variances and normal populations? Set up and perform appropriate TESTS at the α = 0.05 level of significance.
Let S = {c, h, j, q, t, y} be a sample space of an experiment and let E = {c, h}, F = {c, q, y}, and G = {h, j, t} be events of this experiment. (Enter your answers using roster notation. Enter Ø for the empty set.)
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
Randomly select a sample of five rental agencies. Start with row two and column two. The number is 90935. Use the first two numbers starting with 90.
Make up the ages of a group of participants who are freshman, sophomores, juniors, and seniors. You will need the age of 10 participants across each level.
When using SPSS to perform a 2 independent sample t-test, the P-Value was .136...with alpha set to .05. I have to decide to accept or reject the null hypothesis.
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet.
Generate survival times X from an exponential distribution with rate lambda=1 with a censoring distribution C being exponential with rate theta = 2/3. Then Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000..
Based on information, compute the following: Percentage (or portion) of children who watch television less than 6.5 hours a week.
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