A campus researcher wanted to investigate the factors that a

A campus researcher wanted to investigate the factors that affect visitor travel time in a complex. multilevel building on campus. Specifically, he wanted to determine whether different building signs (building maps versus wall signage) affect the total amount of time visitors require to reach their destination and whether that time depends on whether the starting location is inside or outside the building. Three subjects were assigned to each of the combinations of signs and starting locations, and travel time in seconds from beginning to destination was recorded. An Excel output of the appropriate analysis is given below: Referring to Table D. the F test statistic for testing the interaction effect of types of signs is A wealthy real estate investor wants to decide whether it is a good investment to build a high-end shopping complex in a suburban county in Houston. His main concern is the total market value of the 3.605 houses in the suburban county. He commissioned a statistical consulting group to take a sample of 200 houses and obtained a sample mean market price of $225.000 and a sample standard deviation of $38.000 The consulting group also found out that the mean differences between market prices and appraised prices was $125.000 with a standard deviation of $3.400. Also the proportion of houses in the sample that are appraised for higher than the market prices is 0.20. Referring to Table F. what will be the 95% confidence interval for the total market price of the houses in the suburban county constructed by the consulting group? Which of the following is not true about the Student?s t distribution? As the number of degrees of freedom increases, the t distribution approaches the normal distribution, It is used to construct confidence intervals for the population mean when the population standard deviation is known. It is bell shaped and symmetrical. It has more area in the tails and less in the center than does the normal distribution.

Solution

true answer is

1)A

2)D

3)B