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agasfer [191]
3 years ago
12

Here is a triangular prism.

Mathematics
1 answer:
ruslelena [56]3 years ago
3 0

Answer:

7.5 cm2

Step-by-step explanation:

3(5)/2=7.5

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A researcher is planning to compare the effects of two different types of lights on the growth of bean plants. She expects that
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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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The order of operations requires that all multiplication and division be performed first, going from left to right in the expression.

Step-by-step explanation:

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2 years ago
Read 2 more answers
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