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Problem # 60
Owenns Orchards sell apples in a large bag by weight. A sample of seven bag contained the following numbers of apple: 23, 19, 26, 17, 21, 24, 22.
a) Complete the mean number & Median number of apples in a bag
Sample Mean: ¯X=SX/n
¯X= (26+24+23+22+21+19+17)/7
¯X = 152/7
¯(X )= 22
Sample Median:
Low to high High to low
17 26
19 24
21 23
22 22 ? Median 22
23 21
24 19
26 17
b) Verify that ?(X-¯X) = 0
(26-22)+(24-22)+(23-22)+(22-22)+(21-22)+(22-19)+(17-22)=
4+2+1+0-1-3-5=
= -0.2
Problem # 62
The Citizens Banking Company is studying the number of times the ATM located in a Loblaws Supermarket at the foot of Market Street is used per day. Following are the numbers of times the machine was used over each of the last 30 days.
Where:
n = 30
¯X = ?
83 64 84 76 84 54 75 59 70 61
63 80 &n ...