Question

data table 1:
trial (spinning time in seconds)
coin | 1 | 2 | 3 | 4 | average
penny | 6.2 | 6 | 2 | 7 |
nickel | 3 | 6 | 3 | 2.1 |
dime | 5 | 6 | 7 | 8 |
quarter | 6 | 9 | 6.3 | 9 |

Explanation:

Step1: Calculate penny's average

Add 4 trials, divide by 4:
$\text{Average}_{\text{penny}} = \frac{6.2 + 6 + 2 + 7}{4}$

Step2: Calculate nickel's average

Add 4 trials, divide by 4:
$\text{Average}_{\text{nickel}} = \frac{3 + 6 + 3 + 2.1}{4}$

Step3: Calculate dime's average

Add 4 trials, divide by 4:
$\text{Average}_{\text{dime}} = \frac{5 + 6 + 7 + 8}{4}$

Step4: Calculate quarter's average

Add 4 trials, divide by 4:
$\text{Average}_{\text{quarter}} = \frac{6 + 9 + 6.3 + 9}{4}$

Answer:

Coin	Average Spinning Time (seconds)
nickel	$\frac{3 + 6 + 3 + 2.1}{4} = 3.525$
dime	$\frac{5 + 6 + 7 + 8}{4} = 6.5$
quarter	$\frac{6 + 9 + 6.3 + 9}{4} = 7.575$