Answer:
1. 2
2. -44
3. -4
Step-by-step explanation:
idk how to explain i used a calculator sorry if im wrong
The answer should be n/5. Hope this helps.
Answer:
-4.5 ¯\_(ツ)_/¯
Step-by-step explanation:
-4x+5=13
-4x=5+13
-4x=18
-4x/-4=18/-4
x=-4.5
Answer:
15/4 <em>OR 3 whole number 3/4</em>
Step-by-step explanation:
Solution:
To test the hypothesis is that the mean ozone level is different from 4.40 parts per million at 1% of significance level.
The null hypothesis and the alternative hypothesis is :
The z-test statistics is :
z = -1.37
The z critical value for the two tailed test at 99% confidence level is from the standard normal table, he z critical value for a two tailed at 99% confidence is 2.57
So the z critical value for a two tailed test at 99% confidence is ± 2.57
Conclusion :
The z values corresponding to the sample statistics falls in the critical region, so the null hypothesis is to be rejected at 1% level of significance. There is a sufficient evidence to indicate that the mean ozone level is different from 4.4 parts per million. The result is statistically significant.