W
WW
Here is the distribution of blood types for randomly
chosen black Americans:
o
А
в
AB
ele mai bun
AB. C
Blood
Type:
Probability:
0.49
.
0.20
0.04
Joe can safely receive blood transformations from
people with blood types O and B. What is the
probability that a randomly chosen black American
can donate blood to Joe?

answer: the correct one is a

step-by-step explanation:

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation:

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;

answer: what are the answer choices?

step-by-step explanation: