Did you get your 8 hours of sleep last night?" is a common question. In a recent survey of 151 postpartum women, the folks at th
1 answer:
Answer:
There is evidence to suggest that postpartum women do not get enough sleep
Step-by-step explanation:
Given that in a recent survey of 151 postpartum women, the folks at the National Sleep Foundation found that the mean sleep time was 7.8 hours, with a standard deviation of 1.4 hours.
(left tailed test at 5% significance)
Mean difference = -0.20
Std error of sample =
Test statistic t = mean difference/std error =
= -1.76
df = 150
p value one tailed = 0.0402
Since p < alpha, we reject H0
There is evidence to suggest that postpartum women do not get enough sleep
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Number of lilies used= 30 lilies
Number of roses used= 78 roses
To make the six identical arrangements:
We need to divide lilies into six equal parts, as well as number of roses in six equal parts.
I=Number of lilies in each arrangement =
r=Number of roses in each arrangement =
Total number of flowers in arrangement (I + r)= 5 Lilies + 13 Roses=18 (Flowers)
The relationship between l, the number of lilies, and r, the number of roses:
→ 5 I = 13 r
Answer:
P(A) = 0.2
P(B) = 0.25
P(A&B) = 0.05
P(A|B) = 0.2
P(A|B) = P(A) = 0.2
Step-by-step explanation:
P(A) is the probability that the selected student plays soccer.
Then:
P(B) is the probability that the selected student plays basketball.
Then:
P(A and B) is the probability that the selected student plays soccer and basketball:
P(A|B) is the probability that the student plays soccer given that he plays basketball. In this case, as it is given that he plays basketball only 10 out of 50 plays soccer:
P(A | B) is equal to P(A), because the proportion of students that play soccer is equal between the total group of students and within the group that plays basketball. We could assume that the probability of a student playing soccer is independent of the event that he plays basketball.