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Mathematics

2 answers:

KIM [24]2 years ago

8 0

Answer:

answer is in an image here

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Explanation:

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not a bot btw

iren2701 [21]2 years ago

4 0

Assuming she only uses the car for one day 200 miles

52-22=30
30/0.15=200

(If she uses the car for more days do 22 x # of days and then subtract it from 52, then divide that answer by 0.15)

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3 years ago

A professor records the difference between the marks scored by the students in the class test last week and those scored in the

dezoksy [38]

Answer: $(10.82\ , 13.18)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\mu\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 35 , large sample (n>30)

Mean difference : $\overline{x}=12$

Standard deviation : $\sigma=3$

Significance level : $\alpha=- 1-0.999=0.001$

Critical value : $z_{\alpha/2}=z_{0.0005}=3.4807567$

Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

$12\pm\ (3.4807567)\dfrac{2}{\sqrt{35}}\\\\=12\pm1.18\\\\=(10.82\ , 13.18)$

Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = $(10.82\ , 13.18)$

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3 years ago

4 Select the correct answer. Which of these mappings is a function?

melomori [17]

Answer:

? i need a better explanation for ur questoin

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3 years ago

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