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A coin was flipped 60 times and came up heads 38 times.
(a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
(b) Calculate a p-value and interpret it.
Statistics and Probability, Statistics
The critical boundaries (Zcrit) for a hypothesis test are z = +1.96 and z = -1.96. If the z-score for the sample data is z = -1.90, then what is the correct statistical decision? A) Reject H1 B) Fail to reject H1 C) Re ...
You have two investments that either make money or lose money. Each one has a 60 percent chance of making money, and a forty percent chance of losing money. There is a 30 percent chance that both investments make money. ...
According to a January 2013 survey by the Pew Research Center, the percentage of Americans who trust the government in Washington has decreased steadily since Bill Clinton left office.6 Today, approximately 30% of Americ ...
The service manager for a car dealership reviewed sales records of the past 25 sales of new cars to determine the number of warranty repairs he will be called on to perform in the next 90 days. Corporate reports indicate ...
Suppose that the weight of all navel oranges is normally distributed with mean of 8 ounces, if we know that the percentage of oranges that weigh less than 8.7 ounces is 68% find the standard deviation?
In a recent year, 8,032,844 male students and 9,381,579 female students were enrolled as undergraduates. Receiving aid were 64.1% of the male students and 65.7% of the female students. Of those receiving aid, 41% of the ...
In a sample of 20 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 14.1 degrees. What would be the 95% confidence interval for the temperature of your cup of ...
1 . Consider the following data on distances traveled by 60 people to visit the local amusement park. distance freq 1-8 20 9-16 18 17-24 10 25-32 6 33-40 6 Expand and construct the table adding columns for relative frequ ...
A national report indicates that the mean and standard deviation of the ACT scores of incoming freshman at American public universities are 24.6 and 6.2, respectively. A sample of 30 incoming freshmen at a small, suburba ...
A researcher determines that students study an average of 60 15 (M SD) minutes per week. Assuming these data are normally distributed, what is the z score for students studying 45 minutes per week?
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