For this problem, the confidence interval is the one we are looking
for. Since the confidence level is not given, we assume that it is 95%.
The formula for the confidence interval is: mean ± t (α/2)(n-1) * s √1 + 1/n
Where:
<span>
</span>
α= 5%
α/2
= 2.5%
t
0.025, 19 = 2.093 (check t table)
n
= 20
df
= n – 1 = 20 – 1 = 19
So plugging in our values:
8.41 ± 2.093 * 0.77 √ 1 + 1/20
= 8.41 ± 2.093 * 0.77 (1.0247)
= 8.41 ± 2.093 * 0.789019
= 8.41 ± 1.65141676
<span>= 6.7586 < x < 10.0614</span>
Step-by-step explanation:
please mark me as brainlest
Answer:
225 sq. Ft
Step-by-step explanation:
Key words in the question;
Dilated - This means increased pr expanded
Scale factor of 3 - This basically means multiplied by 3
Old square = 75 sq. Ft
This means;
New are = Old area * 3
New area = 75 * 3 = 225 sq. Ft
Answer:
The correct option is B
Step-by-step explanation:
From the question we are told that
The null hypothesis is 
The alternative hypothesis is 
The p-value is 
The level of significance is 
From the given values 
so we fail to reject the null hypothesis
So there is NOT sufficient evidence to conclude the proportion of work time linguists study a new language is more than 10%.
Answer:
<h2>
$2</h2>
Step-by-step explanation:
Lets see how much money she spent first.
$50 - $26 = $24
Now that we know she spent $24 we can divide 24 by twelve which will tell us how much each ride costs
24 / 12 = 2
She spent $2 on each ride
