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3 years ago

Help Plz

Mathematics

1 answer:

hichkok12 [17]3 years ago

7 0

Answer:

Yes , it is independent

Step-by-step explanation:

independent

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Nadia selects three marbles from the jar to the right without replacing them. What is the probability that all three marbles are

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Not very likely. Does a picture come with this question.

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3 years ago

Calibrating a scale:

lana66690 [7]

Answer:

We conclude that the calibration point is set too high.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 1000 grams

Sample mean, $\bar{x}$ = 1001.1 grams

Sample size, n = 50

Alpha, α = 0.05

Population standard deviation, σ = 2.8 grams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 1000\text{ grams}\\H_A: \mu > 1000\text{ grams}$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{ 1001.1 - 1000}{\frac{2.8}{\sqrt{50}} } = 2.778$

Now, $z_{critical} \text{ at 0.01 level of significance } = 2.326$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. We accept the alternate hypothesis. We conclude that the calibration point is set too high.

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3 years ago

A gift box in. The shape of a rectangle prism has 20 CM lakes 14 CM with and 10 CM heights. How Much paper will you need to wrap

umka2103 [35]

Answer:

2800 cm

Step-by-step explanation:

Multiply the width times the height times the 3rd demention

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2 years ago

A teacher is organizing a field trip.each bus can seat up to 46 people.is it better to estimate a greater or lesser number than

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Answer:

Grantor more people might show up

Step-by-step explanation:

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3 years ago

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the temperature at the south pole was -39degree f at 8am. at 3pm it was 10degree f, by how many degrees did the temperature rise

natita [175]

Answer:

Step-by-step explanation: start at -39 degrees. You need to find how many degrees is between -39 and 10 degrees.

+39+10= 49 degrees risen

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3 years ago