Number of adults = 12
Number of children = 17
Step-by-step explanation:
Step 1:
Let a be the number of adults and c be the number of children
Given that the total admission fees paid is $222
Cost for adults is $10 and cost for children is $6
So we have,
10 a + 6 c = 222
Step 2 :
Total people attending is 29
So, a + c = 29
=> a = 29 - c
Step 3 :
Substituting the value for a in the equation in step 1 ,we have
10( 29-c) + 6 c = 222
290 - 10 c + 6 c = 222
-4 c = 222-290 = -68
=> c = -68/-4 = 17
substituting this value of c in the equation in step 2 we have
a = 29 - 17 = 12
So we have 12 adults and 17 children visiting the zoo.
Is this the full question?
<span>a. verify that the conditions for computing a confidence interval are met in this case.
The formula for computing the CI interval is given by:
x_bar+/-z (s/</span>√n<span>)
since:
x_bar=6.67
s=1.88
n=15
The conditions are met because we have all the values necessary for computing CI.
b] </span><span> compute and interpret a 95% confidence interval for the mean number of hours the students at this school sleep each night.
The value of z corresponding to 95% CI is 1.96
thus the 95% CI will be:
6.67+/-1.96(1.88/</span>√15<span>)
=6.67+/-1.96(0.4854)
=6.67+/-0.9514</span>
Answer:
It's B
Step-by-step explanation:
I did the test
Answer:
a. Correlation
Step-by-step explanation:
Correlation is the measure of the degree to which any two variables vary together.In simple words two variables are correlated if they vary simultaneously in some direction.
We have two variables here . One is the measure of anxiety and the other is the number of months.
Paired sample t- test is conducted when we have the paired data. So this option is incorrect.
ANOVA is used for determining the total partitions or total variations.
Multiple Linear regression is used for indpendent variables.
Chi square distribution contains only one variable .
So the correct answer is option a.