2 years ago

I- i- i- i- need help >:(

Mathematics

1 answer:

AURORKA [14]2 years ago

7 0

Step-by-step explanation:

I'm pretty sure it is the last one

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858 i believe...
546/7
78 x 4 (compound a)
312 + original compound b (546)

Hope I helped!
Giving me brainliest is much appreciated! =)

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Step-by-step explanation:

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2 years ago

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Natali5045456 [20]

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Step-by-step explanation:

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3 years ago

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Suppose a research firm conducted a survey to determine the average amount of money steady smokers spend on cigarettes during a

olchik [2.2K]

Answer:

option (b) 0.0228

Step-by-step explanation:

Data provided in the question:

Sample size, n = 100

Sample mean, μ = $20

Standard deviation, s = $5

Confidence interval = between $19 and $21

Now,

Confidence interval = μ ± $z\frac{s}{\sqrt n}$

thus,

Upper limit of the Confidence interval = μ + $z\frac{s}{\sqrt n}$

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Now,

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Hence,

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Answer:

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Step-by-step explanation:

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