It is believed that the number of emergency room visits on Friday nights at hospitals follows a Poisson distribution with ì = 12. Suppose that 30 Friday nights are sampled and the number of emergency room visits (X) are recorded at a particular hospital. A) The hospital administration will conclude that the ER is seeing fewer patients than other hospitals if X < 11. Use the central limit theorem to approximate the probability that this conclusion is made when, in reality, the hospital is not different from the general population of hospitals. What type of error occurs if this conclusion is made? B) Actually, the number of ER visits on Friday nights does not follow a Poisson distribution but instead follows an unknown distribution with μ = 12 and ơ 5. Ūsing the central limit theorem, re-compute the probability found in (a).

step-by-step explanation:

b and c

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m