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Katyanochek1 [597]
2 years ago
7

What’s this need help asap !

Mathematics
1 answer:
Vsevolod [243]2 years ago
5 0
I need points and i’m using this bc you didn’t even give an equation
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Trials in an experiment with a polygraph include results that include cases of wrong results and cases of correct results. Use a
hram777 [196]

Answer and Step-by-step explanation:

This is a complete question

Trials in an experiment with a polygraph include 97 results that include 23 cases of wrong results and 74 cases of correct results. Use a 0.01 significance level to test the claim that such polygraph results are correct less than 80​% of the time. Identify the null​hypothesis, alternative​ hypothesis, test​ statistic, P-value, conclusion about the null​ hypothesis, and final conclusion that addresses the original claim. Use the​ P-value method. Use the normal distribution as an approximation of the binomial distribution.

The computation is shown below:

The null and alternative hypothesis is

H_0 : p = 0.80

Ha : p < 0.80

\hat p = \frac{x}{ n} \\\\= \frac{74}{97}

= 0.7629

Now Test statistic = z

= \hat p - P0 / [\sqrtP0 \times (1 - P0 ) / n]

= 0.7629 - 0.80 / [\sqrt(0.80 \times 0.20) / 97]

= -0.91

Now

P-value = 0.1804

\alpha = 0.01

P-value > \alpha

So, it is Fail to reject the null hypothesis.

There is ample evidence to demonstrate that less than 80 percent of the time reports that these polygraph findings are accurate.

5 0
3 years ago
I need the answer tbh
Blababa [14]
I think the answer would be the first one
8 0
3 years ago
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The graph shows the number of flowers that can be pollinated as the number of bees increase. What is the unit rate?
dybincka [34]

Answer:

6

Step-by-step explanation:

Hope that helps

5 0
3 years ago
A freight elevator can hold a maximum weight of 3,500 pounds.
Brrunno [24]

Answer:

C

Step-by-step explanation:

200 + 48c \leqslant 3500

48c \leqslant 3300

c \leqslant 68.75

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What is the length of EF in the right triangle below?
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