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Who plays online or electronic games? A survey in 2006 found that 69% of 223 boys aged 12 - 14 said they played computer or console games like Xbox or PlayStation . . . or games online.
Of 248 boys aged 15 - 17, only 62% played these games. Is this evidence of a real age-based difference?
Imagine that you are managing a project that involves the development of a new football stadium that will support both the Balitimore Ravens & Washington Redskins (similar to what has been done in New Jersey for the NY Jets/Giants).
If the difference between two means is not statistically significant, how certain are you that the independent variable really does not affect the dependent variable?
Find the implied volatility of the following European call. The call has four months until expiry and an exercise price of $100. The call is worth $6.51 and the underlying trades at $101.50. Assume the risk free interest rate is 8% per annum.
According to the Darvas Box stock trading system, a trader looks at a chart of stock prices over time and identifies box-shaped patterns.- If the sample standard deviation was 12 days, give a 90% confidence interval for the average hold time in days..
Research hypothesis: Turnout tends to be higher in proportional representation electoral systems and research hypothesis: A country's predominant religion influences its democratic status today
1. a matched pairs experiment compares the taste of instant versus fresh-brewed coffee. each subject tastes two
Assume you have the following data: H1: µ ? 200, S =30, n = 64, and X =218. Conduct a two tailed hypothesis test at the 0.05 significance level.
What is a p-value in testing hypothesis? How does this p-value help us to decide to/not to reject a Null hypothesis? What might happen if we do not use this p-value in particular, when we are rejecting a Null hypothesis?
1. What is the probability that at least one of the bonds defaults? 2. What is the probability that neither the seven-year AA-rated bond nor the seven-year A-rated bond defaults?
at a batter testing facility if at least 2 of the 20 batteries tested indicate low voltage the entire lot will be
For a Shewhart control chart using 3-sigma limits,
Determine the degree of freedom, find the critical value, and identify the rejection region. Calculate the test statistic. If convenient, use the technology.
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