3. A sample of 250 auto drivers selected from New York showed that they pay on average $152 auto insurance premium per month with a standard deviation of $38. Make a 98% confidence interval for
the mean monthly auto insurance premium paid by all New York auto drivers.
4. After 784 people were used an inhaler for respiratory issues, 430 experienced mild side effects.
What is the sample mean

answer:

some responsibilities that come with having a checking account -

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 it   can be withdrawn using electronic debits, automated cash machines, or checks among other methods.