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3 years ago

Lesson 9 functions, equations, and graphs unit test part 1

Mathematics

1 answer:

Tatiana [17]3 years ago

6 0

Answer:

what is the question?

Step-by-step explanation:

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Cary and his brother took a road trip together. The total number of miles they drove was more than 200. Cary drove for 50 miles.

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Answer:

Step-by-step explanation:

The trick is not to include anything under and including 150 miles. So A B and C are not to be checked.

D and E are both true.

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There are 12 people having lunch. Each person wants 1/3 of a sub sandwich. How many whole sub sandwich are needed

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12/3= 4
Need 4 whole sub sandwiches in orders for everyone to get 1/3 of a sandwich

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Seven of the 30 Apple computers have specialized movie editing software. Approximately what percent of the Apple Computers can b

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23.3333333 percent repeating.

7/30=23.3333

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3 years ago

The problem is in the picture

Nitella [24]

The problem is the number by the side

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3 years ago

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine foun

QveST [7]

Answer:

We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 31.7 milligrams

Sample mean, $\bar{x}$ = 28.5 milligrams

Sample size, n = 9

Alpha, α = 0.05

Sample standard deviation, s = 2.8 milligrams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 31.7\text{ milligrams}\\H_A: \mu < 31.7\text{ milligrams}$

We use One-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{28.5 - 31.7}{\frac{2.8}{\sqrt{9}} } = -3.429$

Now, $t_{critical} \text{ at 0.05 level of significance, 8 degree of freedom } = -1.860$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and accept the alternate hypothesis. We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

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3 years ago