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padilas [110]
3 years ago
12

Can someone just help me !

Mathematics
2 answers:
CaHeK987 [17]3 years ago
8 0

Answer:

Step-by-step explanation:

I can’t even read it.. ahh umm

Andrej [43]3 years ago
7 0

Answer:

\sqrt{a} 900 - 2

Step-by-step explanation:

I won't be answering using words.

1.     (3a+2a)(6a²+1-3)

2.    (5a)(6a²-2)

3.    6a² × 5a - 2 × 5a

4.    6a × 6a × 5a - 2 × 5a

5.    180a × 5a - 2

6.    900a - 2

7.    \sqrt{a} 900 - 2

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Answer:

\chi^2 =\frac{15-1}{25} 16 =8.96

The degrees of freedom are given by:

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The p value for this case would be given by:

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Step-by-step explanation:

Information given

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\alpha=0.05 represent the confidence level  

s^2 =16 represent the sample variance

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System of hypothesis

We want to test if the true deviation for this case is lesss than 5minutes, so the system of hypothesis would be:

Null Hypothesis: \sigma^2 \geq 25

Alternative hypothesis: \sigma^2

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And replacing we got:

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df = n-1 = 15-1=14

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p_v =P(\chi^2

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