2 years ago

Someone help plz and plz make sure it’s right

Mathematics

1 answer:

Allushta [10]2 years ago

7 0

Answer:12

Step-by-step explanation:

srry if wrong

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The word that is associated with doing something to help protect something is —

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The answer is c i’m pretty sure

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An athlete runs every day for one week. The following week she runs one mile further than she ran on that day the previous week.

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2 years ago

Complete the statement. mL = 7.3 L

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Answer:

7300 mL

Step-by-step explanation:

Remember 1000 mL = 1 L Multiply both sides by 7.3

7300 mL = 7.3 L

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3 years ago

A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Portland. The stu

iVinArrow [24]

Answer:

$-0.061 < P_1 -P_2< 0.025$

Step-by-step explanation:

Give data:

$n_1 = 350$

$n_2 =250$

$x_1 = 23$

$x_2 = 21$

$\hat{P} 1 = \frac{x_1}{n_1} = \frac{23}{350} = 0.066$

$\hat{P} 2 = \frac{x_2}{n_2} = \frac{21}{250} = 0.084$

for 95% confidence interval

$\alpha = 1 - 0.95 = 0.05 and \alpha/2 = 0.025$

$z_{\alpha/2} = 1.96$ from standard z- table

confidence interval for P_1 and P_2 is

$\hat{P} 1 - \hat{P} 2 \pm z_{\alpja/2} \sqrt{\frac{\hat{P} 1(1-\hat{P} 1)}{n_1} +\frac{\hat{P} 2(1-\hat{P} 2)}{n_2}}$

$(0.066 - 0.084) \pm 1.96 \sqrt{\frac{0.066(1-0.066)}{350} +\frac{0.084(1-0.084)}{250}}$

$-0.018 \pm 0.043$

confidence interval is

$-0.018 - 0.043 < P_1 -P_2$

$-0.061 < P_1 -P_2< 0.025$

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2 years ago

3. 0.7kg : 800g I’m pretty bad with ratios lol

julsineya [31]

Answer:

7:8

Step-by-step explanation:

Convert o.7 Kg to Gram

It will be 700 grams

Divide it by 800

700

800

= 7

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3 years ago

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