Solve the equation Solve 3=-(-4+6)
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Answer:
The 95% confidence interval for the standard deviation of the duration times of game play is (279.76, 670.50).
Step-by-step explanation:
The data for the twelve different video games showing substance use were observed and the duration of times of game play (in seconds) are listed below:
S = {4049, 3884, 3859, 4027, 4318, 4813, 4657, 4033, 5004, 4823, 4334, 4317}
It is assumed that the sample was obtained from a population with a normal distribution.
The confidence interval for population standard deviation is given by,
Compute the sample variance <em>s</em>² as follows:
Compute the critical values of Ci-square for 95% confidence level and (<em>n</em> - 1) degrees of freedom as follows:
*Use a Chi-square table.
Compute the 95% confidence interval for the standard deviation of the duration times of game play as follows:
Thus, the 95% confidence interval for the standard deviation of the duration times of game play is (279.76, 670.50).
