Each morning papa notes the birds feeding on his bird feeder. so far this month, he has seen 59 blue jays, 68 black crows, 12 red robins, and 1 cardinal.
if 300 birds visit papa's bird feeder, how many blue jays can he expect to see?

a) 126
b) 75
c) 140
d) 177

I thin that it is A)126

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;