The option that describes the relationship between the two confidence intervals is; The width of I₈₁ will be¹/₉ the width of I₉
<h3>How to calculate width of the confidence interval with normal distribution?</h3>
The width of the confidence interval will be calculated from the formula;
W = 2Z(σ/√n)
where;
z is the z-score at given confidence level
σ is standard deviation
n is sample size
For first sample;
W_i9 = 2Z(σ/√9)
W_i9 = ²/₃Zσ
For second Sample;
W_i81 = 2Z(σ/√81)
W_i81 = ²/₉Zσ
Thus, we will have;
W_i9/W_i81 = (²/₃Zσ)/(²/₉Zσ)
W_i9/W_i81 = 9
W_i81 = ¹/₉W_i9
Read more about width of confidence interval at; brainly.com/question/15934877
By studying pictures and videos and what the teacher taught the whole class
Answer:
option C
Explanation:
but u typed half of the question
Answer:
<em>A. Infrastructure.</em>
Explanation:
The buildings, roads, bridges and so on are part of a country's infrastructure, the set of (public or not) facilities that allow for the function of its living conditions and economy. For example, bridges are built so transportation may be made through ways that were previously unavailable for any or most kind of transport to go through, being made by a company (state's or private) with the intention of providing better access from and to different areas.
