Help HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

8090 [49]3 years ago

5 0

answer:

i want to say its class#1

Step-by-step explanation:

zhenek [66]3 years ago

4 0

Class one is the highest test scores due to the median being more higher than class 2

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Simply the expression. <br>(5.3 x 10^-1) - (4.7 x 10^-1)

Citrus2011 [14]

Answer:

0.06

Step-by-step explanation:

8 0

3 years ago

A psychological researcher did a study with a sample of 84 boys and found that the meam length of time that they remained engage

lord [1]

Part a)
Best estimate for the population mean u:

The population is normally distributed. The best estimate for population mean would be the mean of the sample. So the best estimate for the population mean is 107 seconds.

Part b)
99% confidence interval:
We have the sample mean and population standard deviation so using the z distribution we can find the confidence interval.

The z value corresponding to 99% confidence interval is 2.576

The confidence interval can be found as:

$(u-z* \frac{s}{ \sqrt{n} } ,u+z* \frac{s}{ \sqrt{n} })$

Using the values in the above expression we get:

$(107-2.576* \frac{11.7}{ \sqrt{84} } ,107-2.576* \frac{11.7}{ \sqrt{84} }) \\ \\ 
=(103.71,110.29)$

This means the 99% confidence interval for the population mean is 103.71 to 110.29

4 0

3 years ago

Whats a scalene triangle

Andrei [34K]

Answer:

A scalene triangle is a triangle whose sides are all different in length.

Example:

A triangle with side lengths 2cm, 4cm, and 6cm.

I have provided a visual example below.

Hope this helps :)