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expeople1 [14]
3 years ago
7

7.8 x - 17.2 when x=5

Mathematics
2 answers:
juin [17]3 years ago
8 0
I hope this helps.
7.8x5-17.2=21.8

DaniilM [7]3 years ago
5 0
1) Replace x with 5.

7.8(5) - 17.2

2) Multiply

7.8 x 5 = 39

3) Subtract

39 - 17.2 = 21.8
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Test statistic : z=\dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

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P-value for left tailed test : P(z≤-2.23)=1-P(z<2.23)   [∵P(Z≤-z)=1-P(Z≤z)]

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