3 years ago

On a test of 80 problems, Bill got 75% of the problems correct.

Mathematics

2 answers:

Colt1911 [192]3 years ago

7 0

Answer:

60 problems correct so b is correct

AlekseyPX3 years ago

4 0

Answer b

Explanation

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vlabodo [156]

Answer:

= 0.419

Step-by-step explanation:

in pic

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2 years ago

A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba

Ahat [919]

Answer:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

Step-by-step explanation:

Information provided

n=100 represent the random sample taken

X=21 represent the number of bags overfilled

$\hat p=\frac{21}{100}=0.21$ estimated proportion of overfilled bags

$p_o=0.15$ is the value that we want to test

z would represent the statistic

Hypothesis

We need to conduct a hypothesis in order to test if the true proportion of overfilled bags is higher than 0.15.:

Null hypothesis: $p =0.7$

Alternative hypothesis: $p > 0.15$

The statistic for this case is:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

And replacing the info given we got:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

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3 years ago

Look at the example problem. Suppose Alana walks 6.6 miles the next day. Complete the steps below to find the number of miles sh

alexandr402 [8]

Answer:

Looking at the example Alana will walk. 15.23 miles in two days

step-by-step explanation:

Looking at the example and using place value system

8.63 + 6.60= 15.23 miles

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3 years ago

Can anyone please answer these for me?

yulyashka [42]

11. y=-3x-5

12. y=-5

13. y= -1/3x+5

14. y=3x-5

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3 years ago

Whats the distance between (-1,4) and (1,-5)

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Answer:

Step-by-step explanation:

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3 years ago