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Tanzania [10]
3 years ago
11

A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It

is important that the diameters be as close as possible to an industry standard. The output from each process is sampled and the average error from the industry standard is measured in millimeters. The results are presented next.
Process A Process B
Sample mean 2.0 3.0
Standard deviation 1.0 0.5
Sample size 12 14

The researcher is interested in determining whether there is evidence that the two processes yield different average errors. The population standard deviations are unknown but are assumed equal. If What is the decision if we use 1% level of significance?

a. Fail to reject the null hypothesis and conclude the means are different.
b. Reject the null hypothesis and conclude the means are different.
c. Fail to reject the null hypothesis and conclude the means are the same.
d. Reject the null hypothesis and conclude the means are the same.
Mathematics
1 answer:
bonufazy [111]3 years ago
8 0

Answer:

b). Reject the null hypothesis and conclude the means are different.

Step-by-step explanation:

A hypothesis is characterized as null when the data/statistics display that there is no distinction between the particular features of the groups. As per the details provided, the decision would be to 'reject/deny the null hypothesis and deduce that the means of the processes are different.' This <u>shows that there is no association among the variables due to the distinction in the means of the two processes and other data provided</u>. Thus, <u>option b</u> is the correct answer.

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Slope of 4/5, a width of 30…what is the height..?
maw [93]

\qquad\qquad\huge\underline{{\sf Answer}}

Here we go ~

Slope of the graph can be expressed as :

\qquad \sf  \dashrightarrow \:slope =   \tan( \theta)  =  \dfrac{4}{5}

\qquad \sf  \dashrightarrow \:   \dfrac{x}{30}  =  \dfrac{4}{5}

\qquad \sf  \dashrightarrow \: x =  \dfrac{4}{5}  \times 30

\qquad \sf  \dashrightarrow \: x =  {4}{}  \times 6

\qquad \sf  \dashrightarrow \: x = 24 \: units

So, the value of x is 24 units

8 0
1 year ago
To draw a line segment perpendicular to XY passing through point x
Andrew [12]
What does perpendicular mean? Well, in elementary geometry it mean 2 lines that intersect at a right angle. (90°).

So for Part one. all you need to do is draw a straight line down from the point X. Name the end point of that line M. 

Now you will connect the line M and Z.

Thats it! I hope this helped!! :)




3 0
3 years ago
Read 2 more answers
If f(x)=x^2-7 and h(x)=7x-5, then f(h(2))=
zaharov [31]
We are given 3 equations. Using these equations we can find f(h(2)).

h(x)=7x-5
h(2)=7(2)-5
h(2)=14-5
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f(x)=x^2-7
f(h(2))=(7x-5)^2-7
we know the answer for h(2) by now, so we can substitute for that.
f(9)=9^2-7
f(9)=81-7
f(9)=74

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5 0
3 years ago
Find 2x2 − 2z4 + y2 − x2 + z4 if x = −4, y = 3, and z = 2.
maw [93]
If you put in the substitutions it would be 2*2-(2*2*4)+(3*2)-(-4*2)+(2*4).
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Then using the order of operations you would multiply the 2's together first to get 4 so you have 4-8+6+8+8. 
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3 0
3 years ago
Jay gas $8 he wants to buy a book gir $7.50 the sales tax 6% does he have enough money
Reil [10]
6%=0.06
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7.5+0.45=7.95
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Jay have enough money to buy the book
8 0
3 years ago
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