3 years ago

Last question helo me pls

Mathematics

1 answer:

Yuri [45]3 years ago

3 0

I hope this helps you

You might be interested in

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 = $(10.82\ , 13.18)$

4 0

3 years ago

Misha bought 9 new baseball trading cards to add to her collection. The next day

swat32

She started with 81 baseball cards.

7 0

2 years ago

Which of the following values are in the range of the function graphed below?

slava [35]

The range is the output or the y values in the case of this function. The only y value on this function is 1 therefore the range is 1

5 0

3 years ago