Answer:
b. Do not reject the null hypothesis
Step-by-step explanation:
Given that two random samples of 40 students were drawn independently from two populations of students. Assuming equal variances
we have the following data.
Sample 1
Mean:
76
Standard deviation:
8
Sample size:
40
Sample 2
Mean:
73
Standard deviation:
7
Sample size:
40

Difference -3.000
Standard error 1.681
95% CI -6.3462 to 0.3462
t-statistic -1.785
DF 78
Significance level P = 0.0782
Since p value >0.05,
b. Do not reject the null hypothesis
Answer:
-2x+3y
Step-by-step explanation:
two negatives make a positive
Answer:
The age of Noelle's dad is 54 years and that of Noelle is 20 years.
Step-by-step explanation:
Let the age of Noelle's dad is x years and that of Noelle is (74 - x) years.
{Since, the sum of their ages is 74}
Now, given that the age of Noelle's dad is 6 less than 3 times Noelle's age.
So, 3(74 - x) - 6 = x
⇒ 4x = 222 - 6 = 216
⇒ x = 54
So, the age of Noelle's dad is 54 years and that of Noelle is (74 - 54) = 20 years. (Answer)