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Is the Euro fair? Soon after Euro was introduced as currency in Europe, it was broadly reported that someone had spun Euro coin 250 times and gotten heads 140 times. We want to test the hypothesis about fairness of spinning the coin.
a) Evaluate the true proportion of heads. Use 95% confidence interval. Do not forget to check conditions first.b) Does confidence interval give evidence that coin is unfair when spun? Describe.c) Determine the significance level of this test? Describe.
This assignment involves displaying an understanding of an independent t-test. Based on my hypothetical research question: What do early childhood educators report about their experiences with fathers' involvement in their programs?
In a mobile phone shop on a Sunday morning, out of n = 77 customers x = 19 buy a mobile phone. What is the 95% confidence interval for the proportion of customers buying a mobile phone?
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 Inches and a standard deviation of 0.01 inches.
Find the area under the normal distribution curve to the right of z = -1.03.
A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information.
Determine the range, variance, and standard deviation for the sample data.
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
Assume the probability of a tire blowout is 0.178% per 50,000 miles of use and that a person travels 15,000 miles per year in a car.
Using your experience from previous or current employment, provide a business example where you could use a t-test to assist in a business decision. State the null and alternative hypothesis.
At a college, 70 percent of the students are women and 35 percent of students receive grade of C. About 20 percent of students are neither female nor C students. Use this contingency table.
Assume a random sample of 50 architects and engineers is selected. How likely is it that the random sample contain five or fewer women in these positions.
A consumer group conducts crash test of new model cars. to determine the severity of damage to 2006 mazda 6s resulting from 10-mph crash into a concrete wall, the research group tests six cars of this type and assesses the amount of damage. descri..
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