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3 years ago

5

Graham's monthly bank statement showed the following deposits and withdrawals. If Graham's balance in the account was $47.86 at

the beginning of the month, what was the account balance at the end of the month? Show your work

1 answer:

Aneli [31]3 years ago

7 0

Answer:

Step-by-step explanation:

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2 years ago

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48 children performing.

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3 years ago

The Toylot company makes an electric train with a motor that it claims will draw an average of only 0.8 ampere (A) under a norma

Igoryamba

Answer:

Step-by-step explanation:

Given that population average is 0.8 ampere

Sample size = 9

Sample mean x bar = 1.34 A

Sample std dev s = 0.48

$H_o: x bar =0.8\\H_a: x bar >0.8$

(one tailed test)

Mean difference - $1.34-0.8 =0.54$

Std error = $\frac{s}{\sqrt{n} } =0.16$

t test can be used since sigma is not known and sample size small

t statistic = mean diff/std error = 3.5

df = 8

p value = 0.00404

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3 years ago