Question

l Verizon 9:21 PM 5296 A traffic engineer believes that the number of cars passing through a certain intersection between 2 and 6 pm on weekdays follows a normal distribution with mean 750 and standard deviation 100 A new highway is opened, and it is hypothesized that the number or cars passing through the intersection should decrease as a result. A sample of 15 weekdays is taken, and the mean number of cars passing through the intersection is 710. Decide whether this reduction in traffic is statistically significant. The sampling distribution is: O Normal O None of the above O Student t we would reject the null hypothesis at a 5% significance level if the observed sample mean was less than The value of the test statistic is: The p-value of the hypothesis test is: Select all the conclusions below which are correct. O At a 5% significance level, we would not conclude that there has been a significant reduction in traffic volume At a 10% significance level, we would conclude that there has been a significant reduction in traffic volume. O At a 5% significance level, we would conclude that there has been a significant reduction in traffic volume. O At a 10% significance level, we would not conclude that there has been a significant reduction in traffic volume. in a certain area, public health officials believe that 6% of the population will become ill with the flu during flu season. To test this hypothesis, a random sample of 800 people living in the area is picked, and it is determined that 68 of them had in fact contracted the flu during flu season. Determine if the 696" claim is plausible based on this data using 5%. A 95% confidence interval for the the percentage of individuals in this area contracting the flu is: %to

Answer 1

01 NORMAL 0.05 | 〈4.5. I S : X 707.5263 707.53 ース50 100 Vn IS P- valuu -PZ< - 1.55) 1 stophiom