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3 years ago

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Mary Palm's checking account had a starting balance of $785.63. She wrote a check for $57.00 for groceries and a check for $125.

00 for a car payment. Yesterday she deposited $57.25 in her checking account. What is Mary's current balance? A. $796.38

1 answer:

wariber [46]3 years ago

5 0

785.63-(57+125)
=785.63-182
=603.63

603.63+57.25=$660.87

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So, Null Hypothesis, $H_0$ : $\mu$ = 17 mu {means that mean lead concentration for all such medicines is equal to 17 mu}

Alternate Hypothesis, $H_A$ : $\mu$ < 17 mu {means that the mean lead concentration for all such medicines is less than 17 mu}

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