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bazaltina [42]
3 years ago
15

Slope of (-2,2) and (3,4)

Mathematics
1 answer:
liq [111]3 years ago
7 0

Answer:

2/5

Step-by-step explanation:

Good luck!

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Alexus [3.1K]
 The perimeter is 24 inches squared
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3 years ago
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In 1990, 1000 adults were randomly selected and each was asked if they smoked, 300
Oduvanchick [21]

Answer:

 The proportion of smokers was higher in 1990 than in 2000

Step-by-step explanation:

Solution

Recall that,

The total number of sample 1 (n1) = 1000

Total  sample 2 number  (n2) = 2000

The number of favourable events (X1) = 300

The number of favourable events (X2) = 500

so,

p₁ = X₁/n₁ = 300/1000 = 0.3

p₂ = X₂/n₂ =500/2000 =0.25

α = 0.05

We are interested in testing the hypothesis.

The  hypothesis (Null) ....>  H₀ : p₁ = p₂

Alternate hypothesis------ > H₁ : p₁ > p₂

Thus,

P = X₁ + X₂/ n₁ + n₂

P =300 + 500/1000 +2000

P =800/3000

=0.2667

Now,

Z₀ = P₁ - P₂/√ P (1 -P) (1/n₁ + 1/n₂)

Z₀ =  0.3 - 0.25/√0.2667  (1 - 0.2667) (1/1000 + 1/2000)

Z₀ = 0.4999999999999999/√ 0.2667 (0.7333000000000001) (0.001 +0.0005)

Then,

Z₀ = 0.4999999999999999/√0.00029335666500000004

Z₀ = 2.9193

so,

zα/2 = z0.05/2 =z0.025

zα/2 = 1.6448536269514722

Now, we apply the decision rule:

Decision Rule: Reject the null hypothesis if the statistic value test is higher than the critical value 1.6448536269514722

The statistic value, 2.9193 is greater than the critical value 1.6448536269514722,  then we will reject the null hypothesis.

Therefore, the proportion of smokers was higher in 1990 than in 2000

3 0
3 years ago
Median of 70 61 87 85 72 65 86 80 90 60 63 81 75 77 67
liberstina [14]
I am pretty sure that the median is 80, correct me if I'm wrong :)
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Answer please I am begging !!!!
Jobisdone [24]

7,134 + d = 10,000

Subtract 7,134 from each side:

d = 10,000 - 7,134

d = 2,866

7 0
3 years ago
Read 2 more answers
Please Help
bulgar [2K]

Answer:

I believe it's B,hope this helps! :)

3 0
3 years ago
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