1. The following data represent the total number of 20 defective cordless iron in a particular production day.

2	3	5	7	8
9	10	13	13	15
15	15	18	19	19
20	23	26	28	29

i. Construct a frequency distribution.     

ii. Using the result from part (i), calculate the relative frequencies for each class.   

iii. Using the result from part (i), calculate the cumulative frequencies for each class.

iv. Construct a frequency histogram for these data (use the given graph paper).

v. Construct a frequency polygon for these data (use the given graph paper).

vi. Construct a cumulative frequency graph for these data (use the given graph paper).

 

 

2. 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

 

 

3. 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.

Days to maturity	Frequency f
30-39	1
40-49	6
50-59	6
60-69	9
70-79	6
80-89	5
90-99	7