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elena-14-01-66 [18.8K]
2 years ago
9

RIGHT ANSWERS FOR BOTH 2 AND 3 I NEED HELP right answers :(

Mathematics
1 answer:
disa [49]2 years ago
5 0

Answer:

c and a

Step-by-step explanation:

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Exercise 6.22 provides data on sleep deprivation rates of Californians and Oregonians. The proportion of California residents wh
kherson [118]

Answer:

a. The alternative hypothesis H₀: p'₁ ≠ p'₂ is accepted

b. Type I error

Step-by-step explanation:

Proportion of California residents who reported insufficient rest = 8.0%

Proportion of Oregon  residents who reported insufficient rest = 8.8%

p'₁ = 0.08 * 11545 =923.6

p'₂ = 0.088 * 4691=412.81

σ₁ = \sqrt{n*p_1*q_1}  = \sqrt{n*p_1*(1-p_1)} = \sqrt{11545*0.08*(1-0.08)} = 29.15

σ₂ = \sqrt{n*p_2*q_2}  = \sqrt{n*p_2*(1-p_2)}= \sqrt{4691*0.088*(1-0.088)} = 19.40

Samples size of California residents n₁ = 11,545

Samples size of Oregon residents n₂ = 4,691

Hypothesis can be constructed thus

Let our null hypothesis be H ₀: p'₁ = p'₂

and alternative hypothesis H ₐ: p'₁ ≠ p'₂

Then we have  

z =\frac{(p'_1 -p'_2)-(\mu_1-\mu_2)}{\sqrt{\frac{\sigma^2_1}{n_1}+\frac{\sigma^2_2}{n_2} } }

The test statistics can be computed by

     

t₀ = \sqrt{\frac{n_1n_2(n_1+n_2-2)}{n_1+n_2} } *\frac{p_1'-p_2'}{\sqrt{(n_1-1)\sigma_1^2+(n_2-1)\sigma_2^2} } =      1104.83

c from tables is   P(T ≤ c) = 1 - α where α = 5% and c = 1.65

since t₀ ≥ c then then the hypothesis is rejected which means the alternative hypothesis is rejected

b. Type I error, rejecting a true hypothesis

5 0
3 years ago
Factor the quadratic expression completely.<br> -3x^2 + 17x - 20
Luba_88 [7]
Answer- -(x-4)(3x-5)

Work- -3x^2+12x+5x-20
-3x(x-4)+5(x-4)
7 0
3 years ago
Which statement are true regarding undefinable terms in geometry
Zina [86]

Answer: A plane has two dimensions because it is a flat surface that has length and width but no depth.

7 0
2 years ago
Read 2 more answers
I need to know how to write a proof for why CF is the perpendicular bisector of BD
Soloha48 [4]
It creates a 90 degree angle so that means its perpendicular. 
3 0
3 years ago
16x2 + 10x – 27 = -6x + 5<br> What are the solutions to this equation ?<br> X<br> x=
bonufazy [111]

Answer:

x=-2              x=1

Step-by-step explanation:

16x2 + 10x – 27 = -6x + 5

Add 6x to each side

16x^2+6x + 10x – 27 = -6x+6x + 5

16x^2 +16x -27 = 5

Subtract 5 from each side

16x^2 + 16x – 27-5 = 5 - 5

16x^2 +16x -32 = 0

Factor out 16

16 (x^2 +x-2)=0

Factor

16 (x+2) (x-1) =0

Using the zero product property

  (x+2) =0     x-1=0

x=-2              x=1

5 0
3 years ago
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