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A polling company obtains an alphabetical list of names of voters in a precinct. They select every 20th person from the list until a sample of 100 is obtained. They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
Determine the mean and standard deviation of following probability distribution.
What is the probability that a particular driver has two speeding violations.
Solve this problem explicitly using all five steps of hypothesis testing, and illustrate your answer with a sketch showing the comparison distribution
If a gambler rolls two dice and gets a sum of four, he wins $10; and if he gets a sum of three, he wins $25. The cost to play the game is $5. What is the expectation of this game?
That 95% of all daily sales fell between $19,200 and $36,400. Based on this information what were the mean sales? What was the standard deviation?
The mean number of cargo ships that arrive at a port is 3 per day. The port has staff and facilities to handle up to 6 ships in a day. Using the Poisson distribution, find the probability that, on a given day,
In ANOVA, what does F=1 mean? What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics?
Research question: Are mean crash damages same for these 3 vehicles? Crash1 Crash Damage ($).
How would you use the concept of probabilities to apply to profiles for hiring more satisfied individuals?
A study was conducted with alpha = 0.05 to determine if there is a significant linear correlation between the number of credit hours earned at the time of taking statistics 101 and the grade in the course. Eight pairs of data were collected.
What is the equation for least squares line? Calculate the coefficient of determination.
Bell-shaped with a mean of $45, 000 and a standard deviation of $3, 500. What percentage of teachers earn anywhere from $38, 000 to $48, 500?
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