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vredina [299]
2 years ago
12

Twice the difference of a number and 6

Mathematics
2 answers:
SVEN [57.7K]2 years ago
8 0

Answer:

2(×-6)

Step-by-step explanation:

Correct me if im wrong thanks ●~●

lianna [129]2 years ago
7 0

Answer:

2x=6. I think friend it is correct.

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Step-by-step explanation:

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A manufacturer makes golf balls whose weights average 1.62 ounces, with a standard deviation of 0.05 ounces. Estimate the probab
saul85 [17]

Answer:

P(-1 < z < 1)  = 0.3174

Step-by-step explanation:

Mean (μ) = 1.62 ounces

Standard Deviation (σ) = 0.05

No of balls (sample size n) = 100

X = weight of a ball

Weight of a group of 100 balls must lie in the range 162 ± 0.5 ounces i.e. weight of a single ball will be 162/100 ± 0.5/100 ounces = 1.62 ± 0.005 ounces.

So, we need to find the probability P (1.615 < X < 1.625). We will use the central limit theorem.

z = (Χ' - μ)/(σ/\sqrt{n})

P (1.615 < X < 1.625) = (\frac{1.615 - 1.62}{0.05/\sqrt{100} } < (Χ - μ)/(σ/\sqrt{n}) < \frac{1.625 - 1.62}{0.05/\sqrt{100} })

                                = (-1 < z < 1)

We need to find the probability of P (-1 < z < 1) by looking at the Normal Distribution Probability Table.

In order to make our working simpler, we need to break P (-1 < z < 1) into two parts: P(z < 1) and P(z > -1)

The probability for areas under the normal curve are given for P(z>X) so we can directly find the probability of P (z > -1) by referring to the normal probability table.

P(z > -1) = 0.1587

We can calculate P(z < 1) by subtracting P(z >1) from the total probability (i.e. 1). P(z >1) can be obtained from the normal probability table.

P(z < 1) = 1 - 0.8413 = 0.1587

By adding the two probabilities together, we get:

P(-1 < z < 1) = P(z < 1) + P (z > -1)

                   = 0.1587 + 0.1587

P(-1 < z < 1)  = 0.3174

6 0
3 years ago
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