A plant can produce either purple flowers or white flowers. What is the probability of purple-flowered offspring if two plants t
2 answers:
You might be interested in
Answer:
116.67 m
Step-by-step explanation:
Two triangles are said to be similar if their corresponding angles are equal and the ratio of their sides are in the same proportion.
From the image attached:
∠A = ∠C = 90° (right angled triangle).
∠ABE = ∠CBD (vertically opposite angles are equal to each other)
The angle-angle similarity postulate states that If two angles of one triangle are equal to two angles of another triangle, then both triangles must be similar. Hence:
Since, ∠A = ∠C and ∠ABE = ∠CBD, we can say that ΔABE and ΔCBD are similar triangles. Since they are similar, the ratio of their corresponding sides is equal. Therefore:
BC / AB = CD / AE
BC = 140 m, AB = 30 m, AE = 25 m
substituting:
140 / 30 = CD / 25
CD = (140 / 30) * 25
CD = 116.67 m
The width of the canal = CD = 116.67 m
Answer:
.
Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true proportions for this case are different so then there is enough evidence to conlcude that the real proportion change.
Step-by-step explanation:
Information provided
represent the number of people who answer abstainers in 1947
represent the number of people who answer abstainer recnetly
sample 1 selected
sample 2 selected
represent the proportion estimated of people who answer abstainers in 1947
represent the proportion estimated of people who answer abstainers recently
represent the pooled estimate of p
z would represent the statistic
represent the p value
significance level given
Hypothesis to test
We want to verify if the proportion of adult Americans who totally abstain from alcohol changed , the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Where
Replacing the info given we got:
Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true proportions for this case are different so then there is enough evidence to conlcude that the real proportion change.