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Find the P value for Test statistic 30 for a right-tailed test. d.f. = 18
A)P value < 0.01
B)P value > 0.05
C)0.01 < P value < 0.025
D)0.025 < P value < 0.05
E)none of these
Simple random sampling
Calculate the difference for each subject, then calculate the mean and standard deviation of these differences.
Sample 100 invoices. What is the standard deviation of xbar?
Estimate Carl's performance on the new machine.
Independent-Samples t Test with SPSS In your research, you may find that you must compare the means of two samples related to one particular variable. For example, you may have population samples from two ethnic groups that you wish to compare agains..
Archie is taking a course in probability theory. Discussion sessions with the class TA (teaching assistant) conflict with Archie's trips to the beach. Archie has to decide between attending TA sessions, which might help him do better in the probabili..
Define the following terms: experiment, event, probability, sample space. Explain the properties that must be satisfied by a probability.
Which of the following statements are true? A.Probabilities can be any positive value. B.Probabilities must be nonnegative. C.Probabilities must be negative. D.Probabilities can either be positive or negative.
CW2: QUANTATIVE Portfolio of statistical exercises, You should analyse the dataset and report your findings in a format suitable for publication in a journal. You should include relevant SPSS printouts with your report. Inclusion of the SPSS output i..
A study examined waiting times in die X-ray department for a hospital in Jacksonville, Florida. A clerk recorded the number of patients waiting for service at 9:00 A.M. on 20 consecutive days and obtained the following results. a. Define the experime..
Sammy the Statistics Student wanted to estimate the difference between the population average time of his AM(x1) and PM(x2) commutes. Using 40 AM commutes and 31PM commutes, he found a 95% confidence interval for the difference of mean times of 3 to ..
Osteoporosis is a condition in which bone density decreases often resulting in broken bones. Bone density usually peaks at age 30 and decreases thereafter. to understand more about the condition. a random sample of women aged 50 and over were recruit..
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