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Show transcribed image text 3, EOC-Practice problem #3 Aa Aa Each person in random samples of 247 male and 253 female working adults living in Calgary, Canada was asked how long, in minutes, his or her typical daily commute was ("Calgary Herald Traffic Study," Ipsos, September 17, 2005). The sample of males had a mean commute of 29.6 minutes with a sample standard deviation of 24.3. The sample of females had a mean commute of 27.3 minutes with a sample standard deviation of 24.0 You will use this information to estimate commute times for male and female working Calgary residents Because the answers to the four key questions (QSTN) are , you wil consider a confidence interval for a difference in population means Assume that the samples are representative of the populations from which they are drawn. To compute the 90% confidence interval, you use a t critical value based on degrees of freedom is very large, you can use the standard normal distribution to determine the critical value. degrees of freedom. Since this value of the Use the standard normal distribution to obtain the critical value to determine the 90% confidence interval. Standard Normal Distribution search

3, EOC-Practice problem #3 Aa Aa Each person in random samples of 247 male and 253 female working adults living in Calgary, Canada was asked how long, in minutes, his or her typical daily commute was ("Calgary Herald Traffic Study," Ipsos, September 17, 2005). The sample of males had a mean commute of 29.6 minutes with a sample standard deviation of 24.3. The sample of females had a mean commute of 27.3 minutes with a sample standard deviation of 24.0 You will use this information to estimate commute times for male and female working Calgary residents Because the answers to the four key questions (QSTN) are , you wil consider a confidence interval for a difference in population means Assume that the samples are representative of the populations from which they are drawn. To compute the 90% confidence interval, you use a t critical value based on degrees of freedom is very large, you can use the standard normal distribution to determine the critical value. degrees of freedom. Since this value of the Use the standard normal distribution to obtain the critical value to determine the 90% confidence interval. Standard Normal Distribution search