Answer: the probability that the mean price for the sample was between $3.781 and $3.811 that week is 0.94122
Step-by-step explanation:
Given that;
sample size n = 32
mean μ = $3.796
standard deviation σ = 0.045
P(3.781 < x" < 3.811) = ?
Standard Error S.E = σ/√n = 0.045/√32 = 0.007955
z value for 3.781, z = x-μ/S.E = (3.781-3.796)/0.007955 = -1.8856 ≈ -1.89
z value for 3.811, z = x-μ/S.E = (3.811-3.796)/0.007955 = 1.8856 ≈ 1.89
P(3.781 < x" < 3.811) = P( -1.89 < z < 1.89)
= P(z < 1.89) - P(z < -1.89)
from z-score table
⇒ 0.9706 - 0.02938
⇒ 0.94122
Therefore the probability that the mean price for the sample was between $3.781 and $3.811 that week is 0.94122
Answer:
$6.96
Step-by-step explanation:
(4*8.99) + (3*7)
35.96 + 21 = 56.96
50- 56.96 = -6.96 So she owes 6.96
The answer is .5 meaning half (1/2) of the petals fell off.
Answer:
56-12x
Step-by-step explanation:
36+13-12x+7
49-12x+7
56-12x
Answer:
2/39
Step-by-step explanation:
2 of the 9 balls in the first urn are white. 3 of the 13 balls in the second urn are white. The probability that a ball randomly selected from each are both white is the product:
P(A and B) = P(A) P(B)
P = (2/9) (3/13)
P = 2/39
P ≈ 5.13%
