Answer:
There is enough evidence to claim that population mean 1 is less than population 2 at the 0.05 significance level.
Step-by-step explanation:
We are given the following in the question:
Group 1:
Group 2:
Alpha, α = 0.05
First, we design the null and the alternate hypothesis
Since, the population variances are equal and that the two populations are normally distributed, we use t-test(pooled test) for difference of two means.
Formula:
Pooled standard deviation
Putting all the values we get:
Now,
Since,
We fail to accept the null hypothesis and reject the null hypothesis. We accept the alternate hypothesis.
We conclude that the mean score for Group 1 is significantly lower than the mean score for Group 2.
There is enough evidence to claim that population mean 1 is less than population 2 at the 0.05 significance level.
Answer: 20
Step-by-step explanation:
50 over 1 times 2 over 5 which equals 100 over 5. Divide both numbers by 5 which equals 20.
Answer:
The answer is "".
Step-by-step explanation:
please find the complete question in the attached file.
Answer:
1.67
Step-by-step explanation:
you should do 15 ÷ 9 and you get 1.6666666667 and when you simplify that you get 1.67
When answering things like this do the brackets first, is there are parenthesis in the brackets do those but keep it in the brackets and work regularly after