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blondinia [14]
3 years ago
9

Asap! please help i’ll give brainliest

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
3 0
I’m pretty sure it’s choice D :)
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e 400 trials in which the assistant maintained a neutral expression, the driver stopped in 229 out of the 400 trials. Find a 95%
Fittoniya [83]

Answer:

Step-by-step explanation:

n = 400

Proportion p = 229/400= 0.5725

For 95% confidence interval we use Z value as 1.96

Std error = 0.025

margin of error = 1.96*0.025

Confidence interval 95% = 0.5725±Margin of error

= (0.524, 0.621)

b) When smiled x becomes 277

p = 0.6925

Std error = 0.023

Margin of error= 1.96*0.023

Confidence interval = (0.647, 0.738)

Smiling increases the chances of stopping since mean and conidence interval bounds are showing increasing trend.

6 0
3 years ago
Need to find surface area
quester [9]

Find the area for each shape.

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Finally add both numbers together to get the surface area.

5 0
3 years ago
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Sphinxa [80]

Answer: The answer would be A. 5

Please mark me as brainliest

6 0
3 years ago
What's is the quotient? <br><br>-4 1/3<br>____<br>-3/4 <br>Thank you please answer​
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Step-by-step explanation:

8 0
2 years ago
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