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Combining scores. The first Stat exam had a mean of 80 and a standard deviation of 4 points; the second had a mean of 70 and a standard deviation of 15 points. Reginald scored an 80 on the first test and an 85 on the second.
Sara scored an 88 on the first but only a 65 on the second. Although Reginald s total score is higher, Sara feels she should get the higher grade. Explain her point of view.
If two randoom samples of sizes n1 = 30 and n2 = 36 are selected independently from two populations with mean 78 and 85, and with standard deviations 12 and 15, respectively, then the standard error of the difference between Xbar1 and Xbar2 are eq..
Suppose that the average annual salary for the worker in United States is $39,000.00 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000.00.
assume the readings on thermometers are normally distributed with a mean of 0 degree c and a standard deviation of 1.00
a multiple-choice test has 30 questions and each one has five possible answers of which one is correct. if all answers
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
At.01 significance level, is there relationship between job pressure and age?
american culture and drug abuseassume you are a member of the family research council and have become increasingly
at parkview at any given time the probability that a randomly selected student is a female is 30. with this binomial
The total population of car passengers involved in traffic accidents are classified into six categories: two factors (one with 2 levels and one with 3 levels) crossed.
What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available?
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
which of the sets in the diagram below are independent?why or why not?(be sure you get all pairs of sets)
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