Answer:
a. H0:μ1≥μ2
Ha:μ1<μ2
b. t=-3.076
c. Rejection region=[tcalculated<−1.717]
Reject H0
Step-by-step explanation:
a)
As the score for group 1 is lower than group 2,
Null hypothesis: H0:μ1≥μ2
Alternative hypothesis: H1:μ1<μ2
b) t test statistic for equal variances
t=(xbar1-xbar2)-(μ1-μ2)/sqrt[{1/n1+1/n2}*{((n1-1)s1²+(n2-1)s2²)/n1+n2-2}
t=63.3-70.2/sqrt[{1/11+1/13}*{((11-1)3.7²+(13-1)6.6²)/11+13-2}
t=-6.9/sqrt[{0.091+0.077}{136.9+522.72/22}]
t=-3.076
c. α=0.05, df=22
t(0.05,22)=-1.717
The rejection region is t calculated<t critical value
t<-1.717
We can see that the calculated value of t-statistic falls in rejection region and so we reject the null hypothesis at 5% significance level.
4 times the distance of the earth from sun is the distance between the object and the sun
Answer:
B
Step-by-step explanation:
Answer:
Step-by-step explanation:
<u>Given:</u>
- One time donation = $10
- Hourly donation = $2.25
- Total donation = $39.25
- Number of hours = x
<u>Required equation:</u>
<u>Solve for x:</u>
- 2.25x = 39.25 - 10
- 2.25x = 29.25
- x = 29.25/2.25
- x = 13
Answer:
if DA line is lineer
Step-by-step explanation:
you can use small triangle.. it's slopes ⅕ slope of DC=⅕
