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Test the given claim with traditional method to test the given hypothesis.
A large software company gives job applicants a test of programming ability and the mean for that test has been 160 in the past. Twenty-five job applicants are randomly selected from one large university and they produce a mean score and standard deviation of 183 and 12, respectively. Use a 0.05 level of significance to test the claim that this sample comes from a population with a mean score greater than 160.
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
what sample size should be used in the funding decision study? Use σ = $4000 as a planning value. ________________
What are the two ways of testing a correlation coefficient for significance?
Carry out F test for significance of straight line regression of Y on X and interpret your results.
Let A be the event that a randomly chosen employee has a college degree and B the event that the chosen employee's income is more than $50,000.
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
At significance levels of .05 and .01 test H 0 : the factors A and B are independent.
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
Would it be reasonable to conclude that the population mean is 63 pounds?
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Find the area under the normal distribution curve to the right of z = -1.03.
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