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julia-pushkina [17]
3 years ago
9

The function f (x) = -x^2 + 4x - 3 is graphed in the xy-coordinate plane as shown based on the graph of the function which of th

e following statements are true. Select all that apply

Mathematics
1 answer:
kari74 [83]3 years ago
6 0

Answer:

In the picture attached, the function f(x) = -x² + 4x - 3 is shown.

Based on the graph of the function, the following statements are true:

  • f(x) < 0 on the interval x < 0
  • f(x) < 0 on the interval 0 < x < 1
  • f(x) > 0 on the interval 1 < x < 3
  • f(x) < 0 on the interval x > 3

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Answer:

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Step-by-step explanation:

From the question we are told that

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     The standard deviation is \sigma =  1.9

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given that the confidence level is  85% then the level of significance is mathematically represented as

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Next we obtain the critical value  of \frac{\alpha }{2} from the normal distribution table  the value  is  

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=>     E = 1.44*  \frac{1.9}{\sqrt{189} }

=>     E = 0.1990

The  85%  confidence interval is mathematically represented as  

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=>      13.6- 0.1990 <  \mu <  13.6+ 0.1990

=>      13.4<  \mu < 13.8

           

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