Ok I just helped with Part 1, but these are kind of basis questions. What exactly are you struggling with? What do your notes say?
4.) A data distribution has a mean of 10 and a standard deviation of 2. Suppose we do not know if the distribution is bell-shaped or not. Estimate the proportion of data that falls between 8 and 12.
A.) Cannot be determined B.) 99.97% C.) 95% D.) 68%
5.) A data distribution has a mean of 500 and a standard deviation of 100. Assume the distribution is bell-shaped. Estimate the data values that define the middle 95% of the data.
A.) -2 and 2 B.) 300 and 700 C.) 400-800 D.) -1000 and 1000
6.) A man can travel to work changing buses twice. For this route he has an option between two routes, A and B. From A has 3 routes, C, D, and E and from B has two routes, F and G. However, three of the routes, B, C, and G are one-ways. B and G can used to travel from home to work and C can be used to travel from work to home. How many possible routes does the man have to choose from while traveling from home to work?
A.) 4 B.) 5 C.) 7 D.) 9