Answer: The answer would be 3 +n +4 = 5
Step-by-step explanation:
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Answer:
0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 50
Standard Deviation, σ = 1.3
Sample size, n = 12
We are given that the distribution of hardness of pins is a bell shaped distribution that is a normal distribution.
Formula:
Standard error due to sampling =

P(sample mean hardness for a random sample of 12 pins is at least 51)
Calculation the value from standard normal z table, we have,
0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.
Answer:
21,000,000
Step-by-step explanation:
Divide 7 into 300000000
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3/4 *10 is 7.5. 0.75 * 10 = 7.5
Answer:
-4 + 9
9- 4
Step-by-step explanation: