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The average monthly electric bill of a random sample of 256 residents of a city is $90 with a standard deviation of $24.
a. Construct a 90% confidence interval for the mean monthly electric bills of all residents.
b. Construct a 95% confidence interval for the mean monthly electric bills of all residents.
Jon Molnar will graduate from Carolina Forest High School this year. He took the American College Test (ACT) for college admission and received a score of 30.
Mention the experimental outcomes. Illustrate out a random variable threat that represents the number of heads occurring on the two tosses.
Examine the behaviour of 99% critical values for these degrees of freedom, and comment on the limits in this case.
An elementary school principal would like to know how many hours the students spend watching TV each day. A sample of n = 25 children is selected, and a survey is sent to each child's parents.
What is the p-value and compute a 95% CI for the difference in means between the two groups?
A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:
Define probability and explain the three perspectives. Provide an example of each. Describe the difference between subjective and probabilistic sampling methods. What are the advantages and disadvantages of each?
Automobile manufacturers are interested in the difference in reaction times for drivers reacting to traditional incadescent lights and to LED lights.
What is an independent sample and what is a related sample? When should researchers use varying hypothesis tests for the different types of samples?
What is the difference between the Wilcoxon signed-ranks test and the Wilcoxon rank-sum test? no minimum word count.
Does your analysis change if the term "average" refers to the mean? To the median? Explain what effect this misinformation might have on the perception of the nation's schools.
What is the probability that the person thinks that "Made in America" ads boost sales and uses social media online?
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