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KatRina [158]
2 years ago
9

A manufacturer of cell phone screens is concerned because 12 percent of the screens manufactured using a previous process were r

ejected at the final inspection and could not be sold. A new process is introduced that is intended to reduce the proportion of rejected screens. After the process has been in place for several months a random sample of 100 screens is selected and inspection. Of the 100 screens 6 are rejected. What are the appropriate hypotheses to investigate whether the new process reduces the population proportion of screens that will be rejected
Mathematics
1 answer:
astraxan [27]2 years ago
4 0

Null hypothesis: There is no significant association between the existing process and the new process for reducing the population proportion of screens that will be rejected .

Alternative hypothesis :There is a significant association between the existing process and the new process for reducing the population proportion of screens that will be rejected .

Finally the null hypothesis will be rejected and we should accept the alternate hypothesis

Step-by-step explanation:  

In the existing process the sample size and population was not known.,but the percentage of rejected screens were given as 12%.,but in the new process out of 100 screens only 6 are rejected

 percentage of rejected screens using new process = 6÷ 100 ×100 = 6%  

 percentage of rejected screens using existing (old) process = 12%

so the new process is the effective one which reduces the rejection rate of screens., hence it is concluded that There is a significant association between the existing process and the new process for reducing the population proportion of screens that will be rejected .

so the null hypothesis will be rejected and we should accept the alternate hypothesis

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Look at the number 425,690.<br><br> What is the value of the digit 2?
defon

Answer:

20,000

Step-by-step explanation:

400,000   Digit 4

 20,000   Digit 2

   5,000    Digit 5

      600    Digit 6

<u>+       90</u>     Digit 9  (And 0)

425,690

7 0
1 year ago
On average, 15 minutes elapse between discoveries of fraudulent corporate tax returns in a certain IRS office. What is the proba
Lyrx [107]

Answer:

The probability that more than 30 minutes will elapse before the next fraudulent corporate tax return is discovered=0.1353

Step-by-step explanation:

We are given that

\beta=15

We have to find the probability that more that 30 minutes  will elapse before the next fraudulent corporate tax return is discovered.

Using exponential distribution

P(X> x)=e^{-\frac{x}{\beta}}

The probability that more than 30 minutes will elapse before the next fraudulent corporate tax return is discovered

=P(x>30)=e^{-\frac{30}{15}}

The probability that more than 30 minutes will elapse before the next fraudulent corporate tax return is discovered

P(x>30)=0.1353

Hence, the probability that more than 30 minutes will elapse before the next fraudulent corporate tax return is discovered=0.1353

5 0
2 years ago
PLEASE HELP ME ASAP?!?
Blababa [14]

Answer:

f(x) = \frac{1}{4}x^{2}  > f(x) = -0.5x² > f(x) = x²

Step-by-step explanation:

In a quadratic function leading coefficient decides the width of a graph.

In simpler words, leading coefficient decides the vertical stretch of the graph.

Higher the value of leading coefficient, higher the vertical stretch.

When a graph is vertically stretched it becomes narrower.

(Note: Minus sign of the coefficient decides the opening of the graph, upwards or downwards)

Therefore, f(x) = x² having coefficient = 1 is the narrowest and f(x) = \frac{1}{4}x^{2} will be the widest.

So the descending order will be,

f(x) = \frac{1}{4}x^{2}  > f(x) = -0.5x² > f(x) = x²

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3 years ago
Select the correct answer.
Tju [1.3M]
The second option is the answer
7 0
3 years ago
In a group of 42 children there r twice as many boys as girls how many girls r there
cupoosta [38]
B+g=42
2g=b
use substitution to solve
2g+g=42
3G=42
G=14
There are 14 girls.
6 0
3 years ago
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