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Suppose the daily amount of solar radiation in Los Angeles is normally distribution with mean 450 calories and standard deviation 50. Determine the probability that for a randomly chosen day, the amount of solar radiation is between 350 and 550.
perform hypothesis tests. please label the test statistic you found t value z value or chi square and the value. for
the length of time between breakdowns of an essential piece of equipment is important in the decision of the use of
Suppose you attend a school that offers both traditional courses and online courses. You want to know the average age of all the students. You walk around campus asking those students that you meet how old they are. Would this result in an unbiase..
two random variables x and y have the joint distribution p0 0 0.2 p0 2 0.3 p1 1 0.1 p2 0 0.3 p 2 2 0.1 and px y 0
What is the sum of these probabilities and why is the number less than 1?
Using one proportion z test to find whether or not to support the claim - There is little evidence to reject H 0 , therefore they conclude the tvs are 20 pounds on average.
After deleting that outlier, the 174 values have a mean of 280.5 lb and a standard deviation of 22.1 lb. Does the outlier have much of an effect on the results?
Use the significance level of alpha = .05 to test claim that p > .5. Sample is simple random sample n = 50. Illustrate how to compute beta for test and suppose true population proportion is .6.
Test the hypothesis that the median SAT score is 1000 against the alternative that it is greater using α = 0.05. Use both the sign test and the Wilcoxon signed rank test. Explain if the conclusions are different.
The number of flights by U.S. Airlines has grown rapidly. Here are the number of flights flown in each year from 1995 to 2005.- Find the correlation of Flights with Year.- Make a scatterplot and describe the trend.
Identify the threats to internal validity of the design and explain how such threats could influence the conclusions the study made.
Estimate the average number of defects per board, and place a bound on the error of estimation.
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