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Galina-37 [17]
3 years ago
8

An automobile manufacturer has given its van a 39.0 miles/gallon (MPG) rating. An independent testing firm has been contracted t

o test the actual MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 120 vans, they found a mean MPG of 38.8. Assume the population standard deviation is known to be 2.2. Is there sufficient evidence at the 0.02 level to support the testing firm's claim? Make the decision to reject or fail to reject the null hypothesis.
a. Reject Null Hypothesis
b. Fail to Reject Null Hypothesis
Mathematics
1 answer:
swat323 years ago
6 0

I know that the value of the test statistic is z= -1.00 given the information I just read from your upload.

I want to say B. Fail to Reject Null Hypothesis

But I'm not a 100% sure it's actually B

You might be interested in
10. If possible, determine whether or not triangles LQP and LMN
natita [175]

Answer:

They are similar

Step-by-step explanation:

If two triangles are similar, the ratio of their corresponding side lengths must be equal to each other.

This means that for ∆LQP and ∆LMN to be considered similar to each other, therefore:

LM/LQ = LN/LP

LM = 100

LQ = 12

LN = 75

LP = 9

LM/LQ = 100/12 = 25/3

LN/LP = 75/9 = 25/3

LM/LQ = LN/LP = 25/3, therefore ∆LQP and ∆LMN are similar to each other because the ratio of their corresponding side lengths are the same.

3 0
2 years ago
10 in<br> Given the figure. Find AC.
rjkz [21]

Answer:

if its an arc and center angle is given it could be double the size. IF it is a triangle measure you would use Pythagoras for triangle and trig for given angle, if two triangles are shown and they are scale of each other alternative measures given divide into each measure by the correct line and check this with the matching angles. when found as a division this is the ratio so then you just multiply to find the larger measure but divide to find the smaller measure. AC could also be a junction or vector, if its a type of vector then you just follow the arrows and count how many arrows fit the line pick a direction and ie) if its x2 a then you show a+a.

Step-by-step explanation:

5 0
3 years ago
What is the value of a?
Juli2301 [7.4K]
Actually, the answer is not A, if you're saying A is the first choice above.  That's incorrect.  You will need to use the Geometric mean for right triangles here to figure out what the value of a is.  We will use this form: \frac{YZ}{WZ} = \frac{WZ}{XZ}.  We have a value for YZ of 3; side a is XZ.  That means in order to solve this we need WZ, which we can find using pythagorean's theorem.  3^2 + 4^2 = c^2 and 9 + 16 = c^2 and c = 5.  Now we fill in accordingly: \frac{3}{5}= \frac{5}{XZ}.  Cross-multiply to get 3XZ=25 and side XZ is \frac{25}{3}.  XZ is 25/3 and YZ is 3, so 25/3 - 3 = XY.  That means that XY (side a) = 16/3 or 5 1/3, choice B, or the second one down.
8 0
3 years ago
The diameter of a circle is 26 millimeters. What is the circle's circumference?
Shkiper50 [21]

Step-by-step explanation: the answer for this question should be 81.64 because to find the circumference you need to know the circumference formulas which is  C=TT times d or          C= 2 times TT times r.

C= 3.14 times 26          C= 2 times 3.14 times 13

                                       C= 81.64

C= 81.64

so the answer is 81.64 for the circle's circumference so hopefully that is the correct answer and have a great day

                       

7 0
2 years ago
Read 2 more answers
HELP <br> Ps; i am only writing like this becase i need people to see this
oksano4ka [1.4K]

Thanks dude!

Step-by-step explanation:

Can i have brainly?

3 0
3 years ago
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