3 years ago

2/x+3/y=94/x+9/y=21

Mathematics

1 answer:

Brrunno [24]3 years ago

3 0

Answer:

Step-by-step explanation:

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Each year, all final year students take a mathematics exam. It is hypothesized that the population mean score for this test is 8

drek231 [11]

Answer:

95% Confidence interval: (96.06,103.94)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 85

Sample mean, $\bar{x}$ = 100

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95% Confidence interval:

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Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

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3 years ago

2/x+3/y=94/x+9/y=21​

2/x+3/y=94/x+9/y=21