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The average life of a particular battery is determined to be 56.2 hours with a standard deviation of 4.3 hours. Assume battery life is normally distributed. Batteries in the lower 10% do not meet minimum life requirements. What is the minimum life requirement for a battery?
Recognize and describe potential threats (up to 3) to internal validity.
Then use ogive to estimate median and first and third quartiles. Also utilize it to reply following question: What percent of 60 mutual fund loads are less than 75.
A major benefit of two-way ANOVA over several one-way ANOVAs, If an F test for interaction is significant.
Discuss how the empirical rule helps explain the ways in which the values in a set of numerical data cluster and distribute. Regarding probability, discuss the differences between mutually exclusive events and collectively exhaustive events.
Research has shown that the people often see a correlation between two events when one does not really exist. Why do you think this happens?
When studying simultaneous responses to two categorical questions, we should set up a a) contingency table. b) frequency distribution.
A math course has 2 sections. Section one has 55 students of which 10 received an A. Section two has 45 students of which 11 received an A. If a student was chosen randomly from 100 students
What proportion of the hearing loss in all the workers was attributable to not wearing earplugs?
With each hypothesis, indicate whether the appropriate analysis would be a one-tailed test or a two-tailed test and indicate a type I and type II error, given the context of the hypothesis.
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
If not what would be a better testing strategy? Could you form a Null Hypothesis or an Alternative Hypothesis? If yes, what would they be.
Draw the scatter diagram. Does it appear that x and y are related? If so, how? Test to determine whether there is evidence of a linear relationship
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