Answer:
By the Empirical Rule, 
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
The symbol of a standard deviation is
. So
When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus how many sigma?
By the Empirical Rule, 
Answer:
ok
Step-by-step explanation:
1. 1/4, 2/7, 3/8
2. 12/5
3. 3/4, 7/10, 7/12
4. 1/6, 1/2, 1/4
Answer:
3 donuts are sprinkles
Step-by-step explanation:
1/3 of 12 is 4
1/4 of 12 is 3
4+3=7
12-7=5
Glazed=5
Chocolate=4
Sprinkles=3
The answer should be 3/2 or 1.5
Hope this helps!