From the information given, a right-tailed test using the z-distribution is appropriate.
At the null hypothesis, it is <u>tested if the class of statistics students is not significantly smarter than the general population</u>, that is, their mean IQ is of at most 100, hence:
![H_0: \mu \leq 100](https://tex.z-dn.net/?f=H_0%3A%20%5Cmu%20%5Cleq%20100)
At the alternative hypothesis, it is <u>tested if they are significantly smarter</u>, that is, their mean IQ is greater than 100, hence:
![H_1: \mu > 100](https://tex.z-dn.net/?f=H_1%3A%20%5Cmu%20%3E%20100)
- We are testing if the mean is <u>greater than a value</u>, hence it is a right-tailed test.
- We have the <u>standard deviation for the population</u>, hence, the z-distribution is used.
A similar problem is given at brainly.com/question/23413408
Hello,
The 2 curves (lines) have the same value of y for:
y=4-x
y=2x+3
==>4-x=2x+3
==>3x=1
==>x=1/3
And y=4-1/3=11/3
Sol={(1/3,11/3)}
80 is the number you just divided 10 with??