Answer:
The percentage of samples of 4 fish will have sample means between 3.0 and 4.0 pounds is 66.87%
Step-by-step explanation:
For a normal random variable with mean Mu = 3.2 and standard deviation sd = 0.8 there is a distribution of the sample mean (MX) for samples of size 4, given by:
Z = (MX - Mu) / sqrt (sd ^ 2 / n) = (MX - 3.2) / sqrt (0.64 / 4) = (MX - 3.2) / 0.4
For a sample mean of 3.0, Z = (3 - 3.2) / 0.4 = -0.5
For a sample mean of 3.0, Z = (4 - 3.2) / 0.4 = 2.0
P (3.2 <MX <4) = P (-0.5 < Z <2.0) = 0.6687.
The percentage of samples of 4 fish will have sample means between 3.0 and 4.0 pounds is 66.87%
Sixty eight and nine plus eleven equals 12
Y - 63 = 1/2 (x - 64) (distribute 1/2)
y - 63 = 1/2x - 32 (add 63 to both sides)
y = 1/2x + 31 (this is your answer)
Answer:
1/2
Step-by-step explanation:
Probably of selecting a boy:
20/30 = 2/3
and brought 10 up to 20:
45/60 = 3/4
so Probably of selecting a boy and brought 10 up to 20:
2/3 x 3/4 = 2/4 = 1/2
Answer:
$9.10
Step-by-step explanation:
Jose paid $36.40 <em>in total </em> for 4 movie tickets.
Divide $36.40 with 4
36.40/4 = 9.1
$9.10 is the cost of one movie ticket.
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