3 years ago

Three kids are dividing a pizza with a total of 8 pieces. How many pieces can each kid

Mathematics

1 answer:

Alex3 years ago

6 0

Answer:

Each kid can have 2 pieces

Step-by-step explanation:

8 / 3 = 2.67

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In a metal fabrication process, metal rods are produced to a specified target length of 15 feet. Suppose that the lengths are n

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Answer:

95% Confidence interval: (14.4537 ,15.1463)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 15 feet

Sample mean, $\bar{x}$ = 14.8 feet

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, σ = 0.65 feet

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95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 15 and}~\alpha_{0.05} = \pm 2.1314$

$14.8 \pm 2.1314(\dfrac{0.65}{\sqrt{16}} ) \\\\= 14.8 \pm 0.3463 = (14.4537 ,15.1463)$

is the required confidence interval for the true mean length of rods.

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