Consider the following table for the total annual returns for a given period of time.

Series	Average return	Standard Deviation
Large-company stocks	11.7		20.6
Small-company stocks	16.4		33.0
Long-term corporate bonds	5.7		8.6
Long-term government bonds	6.1		9.4
Intermediate-term government bonds	5.6		5.7
U.S. Treasury bills	3.8		3.1
Inflation	3.1		4.2

Requirement 1:

What range of returns would you expect to see 95 percent of the time for long-term corporate bonds?

Expected range of returns

% to %

Requirement 2:

What about 99 percent of the time?

Expected range of returns

% to %

I've attached an answered question similar to mine, but with different number.

1. Consider the following table for the total annual returns for a given period of time. Series Average return Large-company stocks 11.7 % Small-company stocks 16.4 Long-term corporate bonds 6.8 Long-term government 6.1 bonds Intermediate-term 5.6 government bonds U.S. Treasury bills 3.8 Inflation 3.1 Standard Deviation 20.6 33.0 9.8 9.4 5.7 3.1 4.2 Requirement 1: What range of returns would you expect to see 68 percent of the time for long-term corporate bonds? (Do not include the percent signs (%). Negative amount should be indicated by a minus sign.Input your answers from lowest to highest to receive credit for your answers. Round your answers to 2 decimal places (e.g., 32.16).) Expected range of returns -3.00 2% % to 16.60 2% % Requirement 2: What about 95 percent of the time? (Do not include the percent signs (%). Negative amount should be indicated by a minus sign. Input your answers from lowest to highest to receive credit for your answers. Round your answers to 2 decimal places (e.g., 32.16).) Expected range of returns -12.80 2% % to 26.40 2% % Explanation: Looking at the long-term corporate bond return history, we see that the mean return was 6.8 percent, with a standard deviation of 9.8 percent. The range of returns you would expect to see 68 percent of the time is the mean plus or minus 1 standard deviation, or: R 1 = 6.8% 1(9.8%) = -3.00% to 16.60% The range of returns you would expect to see 95 percent of the time is the mean plus or minus 2 standard deviations, or: R 2 = 6.8% 2(9.8%) = -12.80% to 26.40%