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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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Rosie washes clothes for two families the first family pays her $500 more per month than the second. Her total earning per month
disa [49]

Answer:

  • Family 1:  $1.850
  • Family 2: $1.350

Step-by-step explanation:

We know that the total monthly payment is 3200, so if we call Pa (family A`s payment) and Pb (Family B's payment) the payments:

  • Pa+Pb=3200
  • also, Pa = Pb+500

So if we replace Pa in the first ecuation:

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then Pa+Pb=3200 => Pa= 3200-1350= $1.850

Good Luck!

8 0
3 years ago
Which of the following equations represents a line that is perpendicular to y=3x+11 and intercepts the line at the point, (-2, 5
yaroslaw [1]
If the line is perpendicular the slope is the reciprocal so it would be
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Then if the line has to go through the point (-2,5) the y-intercept must be 5 making the answer
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7 0
3 years ago
The ratio of fiction to nonfiction books in the library is 4:5. If there are 900 books in a collection, how many are fiction?
jekas [21]
There will be excactly 400 fiction books. The ratio of fiction to all is 4 to 9, or 4 to 900.
4 0
3 years ago
What’s the answer to my question
Natali [406]

Answer:

I think its 71

Step-by-step explanation:

Well the average between  -3 -2 and -1 seems to be -2, so all i do is 95-24 and you get 71, either that or 65. I highly think its 71 though

4 0
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