Calculate the sample mean and sample variance for the following frequency distribution of hourly wages for a sample of pharmacy assistants. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Hourly Wages (in Dollars) Class Frequency 6.01 - 8.00 50 8.01 - 10.00 42 10.01 - 12.00 13 12.01 - 14.00 16 14.01 - 16.00 23

--- Sample mean

--- Sample variance

Step-by-step explanation:

Given

Solving (a): The mean

First, we calculate the class midpoint (x); this is the average of each class.

For 6.01 - 8.00

When done for the whole classes, the frequency table will become:

The mean is then calculated as:

Solving (b): The sample variance

This is calculated using:

So, we have:

answer:

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1. we have to maintain check register with exactness to avoid checks being returned for insufficient funds which is called bouncing a check.

2. we need to update our check register each time we make a transaction using a convenience card. updating check register will   save   us from   overdrawing of checking account.

3. read the agreement the bank gave you when you signed up for our checking account. this includes all the fees and the minimum balance we need to keep in our account to avoid maintenance charges.  

explanation:

note : -   checking account is a transactional deposit account. we can use it to deposit and withdraw funds. money in a checking account is very liquid. it   can be withdrawn using electronic debits, automated cash machines, or checks among other methods.