According to the Central Limit Theorem, the distribution of the sample means is approximately normal, with the mean equal to the population mean (1.4 flaws per square yard) and standard deviation given by:

The z-score for 1.5 flaws per square yard is:

The cumulative probability for a z-score of 1.11 is 0.8665. Therefore the probability that the mean number of flaws exceeds 1.5 per square yard is
1 - 0.8665 = 0.1335.
Answer:
2/3
Step-by-step explanation:
There are 2 numbers out of 3 that fit the rule, 1 and 3. There is a 2/3 chance picking one of them.
Valid because 3 x 3 is 9 :))
Answer:x= -8 or 2
Step-by-step explanation:
Answer:
950
Step-by-step explanation:
As, 45% will be vanilla, and 17% will be strawberry
So chocolate will be = 38%
As, 45%+17%+38% = 100%
So 38% of 2,500 = chocolate cones
= 38/100 x 2,500 = 950
So the number chocolate ice cream cone sold is 950.