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A recent report from the American Medical Association claims that for the first time in ten years, the average salary of psychiatrists was greater than $190,000 with a standard deviation of $27,000. What is the null hypothesis for his claim?
The Eagle Ridge Contractors Association claims the average price of a home in their subdivision is $125,250. A sample of 36 homes for sale in this subdivision has an average selling price of $127,500 with a standard deviation of $7,250. At alpha = 0.05, what is the test value?
What is the critical t-value for a two-tailed test when alpha = 0.02 and d.f. = 19?
To give 98% confidence interval for population mean μ, you would use critical value.
If a baseball player's batting average is 0.340 or 34%, find the probability that the player will have a bad season and only score at most 60 hits in 200 times at bat?
If one item is chosen at random, determine these probabilities. It is a TV
Lewis earned 85 on his biology midterm and 81 on his history midterm. In the biology class the mean score was 79 with standard deviation 5.
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
Research the topic of Job Satisfaction using the Business Source Premier Database (EBSCO) and/or the ABI Inform Global database in the Library using the instructions linked here.
The five year surival rate for Caucasians for all forms increased from 37% in 1960 to 58% now. Express this change in two ways (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent.
Construct a scatterplot for the (x, y) values below, and answer the following questions. What would be the slope of this regression line?
For each of the following statistical tests, state the null hypothesis and the two sided alternative hypothesis.
Formulate a linear programming model for this problem.
Determine the p-value; and at 95% confidence, test the above hypotheses.
Assume 1.5% of antennas on new Nokia cell phones are imperfect. For random sample of 200 antennas, determine the probability that: None of the antennas is defective.
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