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givi [52]
3 years ago
15

We wish to study the quality of our production line. We take a random sample of 1000 widgets from our line. A quality rating was

determined for each of the 1000 widgets, and the average quality rating in the sample was 4. The sample standard deviation was 0.5. Also, 6 of the 1000 widgets were found to be defective.
Estimate the average quality rating for widgets from our production line, and include the uncertainty in this estimate in the form, a ± b.
Mathematics
1 answer:
mario62 [17]3 years ago
4 0

Answer:

Average quality rating was 4.54+-0.00549

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Help?,?,?,?.!.??.?.?.?.?.?.
DaniilM [7]

Answer:

Step-by-step explanation:

b(a + 1) + a = b*a + b + a = ab + b + a

1) b(2a +1 ) = b*2a + b*1 = 2ab + b  Not equivalent.

2)a + (a +1)*b = a + ab+ b     Equivalent

3) (a +1)(b+ a) = a*(b +a) + 1*(b+a) = ab+ a² +b + a  Not equivalent.

4) (a + 1)b + a = ab+ b + a   Equivalent

5) a + b(a+1) = a +ab + b Equivalent

6) a + (a +1) + b = a + a + 1 + b = 2a + 1 +b  Not equivalent.

7) a(b +1) + b = ab + a + b  Equivalent

5 0
3 years ago
-0.18 divied by 0.03
postnew [5]
Answer:
-6

Explanation: use a calculator lol


6 0
3 years ago
For 1983 through 1989, the per capita consumption of chicken in the u.S. Increased at a rate that was approximately linear. In 1
Volgvan

We have been given that in 1983, the per capita consumption was 39.7 pounds, and in 1989 it was 47 pounds.

Let us assume t=0 corresponds to year 1980.

Hence, we can express the given information as ordered pairs as (3,39.7) and (9,47).

We can to find a linear function passing through these points. Let us first find slope of the linear function:

m=\frac{y_{2}-y_{1} }{t_{2}-t_{1}} =\frac{47-39.7}{9-3} =\frac{7.3}{6} =\frac{73}{60}

We can write the required linear function as:

y-39.7=\frac{73}{60}(t-3)

Upon simplifying  this, we get:

y=\frac{73}{60}t+\frac{721}{20}

In order to find per capita consumption in 1995, we need to substitute t=15 in this function.

y=\frac{73}{60}(15)+\frac{721}{20}=54.3

Therefore, we would expect the per capita consumption of chicken in 1995 to be 54.3.

3 0
3 years ago
Describe in detail where do pandas live. (3-5 sentences)
harina [27]

Answer:

Giant Pandas are big creatures that live in south central China. In Sichuan, Shaanxi and Gansu provinces in mountain ranges. They live there because they get heat stress if the temperature rises 25 degrees Celsius (77 F). “They have to live at temperatures below that to stay healthy,” Spotila said. “In nature, they actively seek out cool areas (micro habitats) in summer and move to higher elevations to avoid heat.”

Step-by-step explanation:

4 0
3 years ago
Yesterday, Jake rode his bike 6.6 miles. Today he rode2.4 times as far, how many miles did he ride today?
Paul [167]

Answer:

15.84

Step-by-step explanation:

6.6 × 2.4 = 15.84

he rode 15.84 miles today

3 0
3 years ago
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