Answer:
H0 : μd = 0
H1 : μd ≠ 0
Test statistic = 0.6687 ;
Pvalue = 0.7482 ;
Fail to reject H0.
Step-by-step explanation:
H0 : μd = 0
H1 : μd ≠ 0
Given the data:
Before: 15 26 66 115 62 64
After: 16 24 42 80 78 73
Difference = -1 2 24 35 -18 -9
Mean difference, d ; Σd / n
d = Σx / n = ((-1) + 2 + 24 + 35 + (-18) + (-9))
d = Σx / n = 33 / 6 = 5.5
Test statistic = (d / std / sqrt(n))
std = sample standard deviation = 20.146
Test statistic = 5.5 ÷ (20.146/sqrt(6))
Test statistic = 0.6687
The Pvalue :
P(Z < 0.6687) = 0.7482
At α = 0.05
Pvalue > α ; Hence we fail to reject H0
The data does not suggest a significant mean difference in the average number of accidents after information was added to road signs.
Answer:
C≈43.98cm
Step-by-step explanation:
C=2πr
d=2r
C=πd=π·14≈43.9823cm
Answer:
Population is;
Option A - All women in the country
Sample is Option C;The 1,004 women selected
Step-by-step explanation:
We are told that 1004 women in a country were asked whether they favor or oppose the use of "federal tax dollars to fund medical research using stem cells obtained from human embryos.
This 1004 women is just a sample among the entire women in the country.
Thus, the population is all women in the country while the sample is 1004 Women
Answer:
<em>The volume of pyramid B is 64 times the volume of pyramid A.</em>
<em></em>
Step-by-step explanation:
Given:
Two square pyramids A and B.
Side Length of A,
12 inches
Height of A,
8 inches
Side Length of B,
48 inches
Height of B,
32 inches
To find:
How many times bigger is the volume of pyramid B than pyramid A?
OR
is how many times bigger than
?
Solution:
First of all, let us have a look at the formula for volume of a pyramid:

Here, base is square, so:

Volume of pyramid A:


Volume of pyramid B:


<em>The volume of pyramid B is 64 times the volume of pyramid A.</em>
Answer:
Obtuse.
Step-by-step explanation: