Arandom sample of 50 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $18.21 per car. the population standard deviation is $5.92. round your answers to two decimal places.

(a) state the point estimate for the population mean cost of fast food bills at this restaurant $

(b) calculate the 95% margin of error. $

(c) state the 95% confidence interval for the population mean cost of fast food bills at this restaurant. $ ≤ µ ≤ $

(d) what sample size is needed if the error must not exceed $1.00? n =

a)

b) 1.64

c) (16.57,19.85)

d) The sample size must be 135 or greater if the error must not exceed $1.00.

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 50

Sample mean =   $18.21

population standard deviation = $5.92

a)  Point estimate for the population mean cost

b) Margin of error =

Margin of error =  

c) 95% Confidence interval

Putting the values, we get,

d) Marginal error less than $1.00

Thus, the sample size must be 135 or greater if the error must not exceed $1.00.

the population of other specie of birds will decline or other specie of birds will find some alternate source of food to survive.

explanation:

according to the competitive exclusion principle, which is also known as gause's law, two specie living in the same niche and feeding on the same resource cannot co-exist stably.

as we have well studied the theory of natural selection which states that only those organisms survive which have better tendency to compete for food and adapt to the environmental conditions.

coming towards the question, what wi ll happen when one species outcompetes the other for the small fish , the other specie will not get enough food and will start to die or decline in population. eventually either other specie needs to find another alternative food source for itself or migrate at some other location where there is less competition otherwise it will just not exist anymore at that niche.

hope it !