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3 years ago

For every $4 Gillian makes, her friend Lucas makes $5.

Mathematics

2 answers:

mario62 [17]3 years ago

5 0

Answer:

43,200

Step-by-step explanation:

4/5=x/54000

Yakvenalex [24]3 years ago

3 0

Answer:

67500

Step-by-step explanation:

4-----54000

5-----x

4x=54000*5

x=67500

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MaRussiya [10]

Step-by-step explanation:

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2 years ago

A researcher is planning to compare the effects of two different types of lights on the growth of bean plants. She expects that

kicyunya [14]

Answer:

The sample size is $n = 36$

Step-by-step explanation:

From the question we are told that

The sample standard deviation is $s = 1.5$

The mean difference of the two groups is $\=x _ 1 - \=x_2 = 1$

The standard error is $SE = \frac{ \= x_1 - \= x_2}{4}$

=> $SE = \frac{1}{4}$

Let assume that the confidence level is 95% hence the level of significance is

$\alpha = (100-95)\%$

=> $\alpha = 0.05$

So the critical value of $\frac{\alpha }{2}$ obtained from the normal distribution table is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically evaluated as

$E = Z_{\frac{\alpha }{2} } * SE$

$E = 1.96 * \frac{1}{4}$

$E = 0.49$

Generally the sample size is mathematically represented as

$n =[ \frac{Z_{\frac{\alpha }{2} * s^2}}{E}]^2$

=> $n = [\frac{1.96 * 1.5}{0.49} ]^2$

=> $n = 36$

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3 years ago

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zaharov [31]

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3 years ago

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Answer:

Step-by-step explanation:

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statuscvo [17]

Answer:

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Step-by-step explanation:

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