If someone could please help me explain why the answers to these three questions are as they are.....
Over a certain time period, did the number of shares of stocks in Ruth's portfolio increase?
1) over the time period, ratio of number of shares to stocks to the total number of shares of stocks and bonds in ruth's portfolio increased
2) over the time period, the total number of shares of stocks and bonds in ruth's portfolio increased
answer: c
The lifetimes of all batteries produced by a company in a year have a distribution that is symettric about the mean m. If the distribution has a standard deviation of d, what percent of the distribution is greater than m + d?
1) 68% of distribution lies in interval from m-d to m+d inclusive
2) 16% of distribution is less than m-d
Answer: d
What is the value of the positive integer m
1) when m is divided by 6, the remainder is 3
2) when 15 is divided by m, the remainder is 6
answer b
Over a certain time period, did the number of shares of stocks in Ruth's portfolio increase?
1) over the time period, ratio of number of shares to stocks to the total number of shares of stocks and bonds in ruth's portfolio increased
2) over the time period, the total number of shares of stocks and bonds in ruth's portfolio increased
answer: c
The lifetimes of all batteries produced by a company in a year have a distribution that is symettric about the mean m. If the distribution has a standard deviation of d, what percent of the distribution is greater than m + d?
1) 68% of distribution lies in interval from m-d to m+d inclusive
2) 16% of distribution is less than m-d
Answer: d
What is the value of the positive integer m
1) when m is divided by 6, the remainder is 3
2) when 15 is divided by m, the remainder is 6
answer b
