Answer:
The degree of freedom for the test is 27.
Step-by-step explanation:
The experiment performed by the researcher is to determine the number of time the rat touches the specific object compared to a different object.
The parameter under study is the mean number of times the rat touches the specific object.
The hypothesis for the test is defined as:
<em>H₀</em>: The mean number of times the rat touches the specific object is not more than that for a different object, i.e. <em>μ </em>≤ <em>μ</em>₀<em>.</em>
<em>Hₐ</em>: The mean number of times the rat touches the specific object is more than that for a different object, i.e. <em>μ </em>> <em>μ</em>₀<em>.</em>
A <em>t</em>-test for single mean is performed.
The information provided is:
<em>α</em> = 0.05
<em>t</em> = 2.842
<em>n</em> = 28
The degrees of freedom for a single mean <em>t</em>-test is:
df = (<em>n</em> - 1)
= 28 - 1
= 27
Thus, the degree of freedom for the test is 27.
Answer:
108
Step-by-step explanation:
we first add 7+8=15 then 15×2=30 30+6=36 36×2=108
To answer this we will DIVIDE the amount of baskets by 4 (since it is 1/4) to see how many she has ALREADY packed, and ho many she has left. Lets do it:-
128 ÷ 4 = 32
CHECK OUR WORK:-
32 × 4 = 128.
So, she has done 32 baskets. lets see how many more she needs to pack:-
128 - 32 = 96.
So, Shelia has 96 baskets LEFT to pack,
Hope I helped ya!!
Answer:
5+2=7
6+180=186
186+7=193
the answer is 193m
Step-by-step explanation:
Answer:
x= 2 and y = -4
Step-by-step explanation:
8x + 3y = 4 ---------------------------------(1)
-7x + 5y = -34 -----------------------------(2)
Multiply through equation (1) by 5 and multiply through equation(2) by 3
40x + 15y = 20 ----------------------------(3)
-21x + 15y =-102----------------------------(4)
Subtract equation (4) from equation (3)
61x = 122
Divide both-side of the equation by 61
61x/61 = 122/61
(At the left-hand side of the equation 61 will cancel-out 61 leaving us with just x, while at the left-hand side of the equation 122 will be divided by 61)
x = 122/61
x=2
Substitute x= 2 into equation (1)
8x + 3y = 4
8(2) + 3y = 4
16 + 3y = 4
Subtract 16 from both-side of the equation
16-16 + 3y = 4-16
3y = -12
Divide both-side of the equation by 3
3y/3 = -12/3
y = -4
x= 2 and y = -4