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We are studying hypothesis testing. My instructor asked: Once the p-value is determined, how do you decide whether or not your evidence is strong enough? In other words, what is your criteria for rejecting the null hypothesis?
What is the correlation between pre-test scores and post-test scores? Assuming the obvious directional hypothesis (i.e., that those who score highly at pre-test tend to score highly at post-test), is the correlation statistically significant?
Develop a schedule for hiring new employees.
2. The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people used the new toothpaste for 6 months. The mean number of cavities at their next checkup is 1.5. In the ge..
The number of employee accidents from the housekeeping department in Hotel A is related to bed height, bed size, and spinal loading. The linear regression model formula has been calculated as following: Y = 3.9+ 8.5(X1) + 2.9(X2) + 5(X3). Calculate t..
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is greater than 450. To do so, she selected a random sample of 25 divers and found s = 468. Assuming that the systolic blood press..
In a sample of 120 people, 50 indicated that they prefer domestic automobiles, 60 said they prefer foreign-made cars, and 10 indicated no difference in their preference. At a 0.05 level of significance, determine if there is evidence of a s..
Whats the temperature
Design that examines the effects of region of residence in northeast, south, mid-west, and west and income that is low, medium, and high
6. Bay Area Community College (BACC) has collected data comparing the starting salaries of their graduating students with last names beginning with the letters A through M with those whose last names begin with N through Z. The first category,..
Research question - Is there a positive correlation between the amounts of profits (Dependent Variable) and total sales (Independent Variable) based on the costs of the process of production and distribution?
Burger Q sells about 500 DoubleHappinness burgers daily. It is their trademarked star seller that is a double burger. As their customers are rather unpredictable, they need to carry extra 750 burgers. Burger Q buys the patties from John’s Farm, who c..
Generally, an ANOVA test is used when 3 or more variables are compared. True or False
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