1.The grocery expenses for six families were $65.48, $65.46, $80.86, $43.9, $88.75, and $81.49. Compute the a) mean, median and mode and b) variance and standard deviation for the grocery bill. Round to the nearest cent.

2.The first two columns of the accompanying table provide a frequency distribution, for the days to maturity of a sample of 40 short-term investments. Calculate the sample standard deviation.

Frequency Days to maturity 30-39 40-49 E 50-59 60-69 70-79 6 80-89 5 90-99 7