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Alexeev081 [22]
2 years ago
8

What's 3 copies of 2 tenths

Mathematics
1 answer:
schepotkina [342]2 years ago
8 0
Multiply 2/10 by 3/1 and you should end up with 6/10
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A company claims that the mean weight per apple they ship is 120 grams with a standard deviation of 12 grams. Data generated fro
Veronika [31]

Answer:

There is no sufficient evidence to reject the company's claim at the significance level of 0.05

Step-by-step explanation:

Let \mu be the true mean weight per apple the company ship.  We want to test the next hypothesis

H_{0}:\mu=120 vs H_{1}:\mu\neq 120 (two-tailed test).

Because we have a large sample of size n = 49 apples randomly selected from a shipment, the test statistic is given by

Z=\frac{\bar{X}-120}{\sigma/\sqrt{n}} which is normally distributed. The observed value is  

z_{0}=\frac{122.5-120}{12/\sqrt{49}}=1.4583. The rejection region for \alpha = 0.05 is given by RR = {z| z < -1.96 or z > 1.96} where the area below -1.96 and under the standard normal density is 0.025; and the area above 1.96 and under the standard normal density is 0.025 as well. Because the observed value 1.4583 does not fall inside the rejection region RR, we fail to reject the null hypothesis.

5 0
3 years ago
A collector has 120 movie posters and 100 band posters she wants to sell 24 movie posters but still have her poster collection m
Ahat [919]

Answer:

They should sell 20 band posters.

Step-by-step explanation:

24 is 1/5 of 120 so we must find what 1/5 of 100 is.

it is 20.

5 0
3 years ago
Try it<br> Solve the system of equations.<br> 2x + 3y = 1<br> 5x + 2 = 8<br> What is the solution?
Stella [2.4K]

Answer:

x=6/5 ,y= -7/15

Step-by-step explanation:

we are going to solve this simultaneously.

2x+3y=1.......(i)

and

5x+2=8

5x=6

x= 6/5 .......(ii)

Now let's put value of x into equation number (i)

2x+3y=1

2(6/5) +3y=1

12/5 +3y =1

3y= 1-(12/5)

3y = -7/5

y = (-7/5) ÷3

y= -7/15

3 0
3 years ago
Sarah found the mean of a set of numbers to be 205.09.how should she read this value out loud?
Elena-2011 [213]
Two hundred and 5, point zero nine or 0 9
6 0
3 years ago
Read 2 more answers
How do I evaluate the function f(x)=3x-2 when x=-1?
inessss [21]
F(x)=(3(-1))-2 so the answer is 5
8 0
2 years ago
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