What percent of all patients are blood type AB? Round your answer to the nearest tenth of percent
1 answer:
Answer:
4.6%
Step-by-step explanation:
Here we are given a table providing us information regarding various blood groups of both males and females. Here from the table we can see that total number of people in the survey is 717. it includes =d all the blood group and both men and women.
Not let us see the number of people with blood groups AB.
From the table we can say that there are 33 people with AB blood grpup. Including men and women.
Hence our data to evaluate the percentage is 33 people with AB blood group among 717 people.
Hence percentage =
Percentage = 0.046 approx
Percentage = 4.6
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The confidence interval would be (10.44, 12.16). This means that if we take repeated samples, the true mean lies in 90% of these intervals.
To find the confidence interval, we use:
We first find the z-value associated with this. To do this:
Convert 90% to a decimal: 90% = 90/100 = 0.9
Subtract from 1: 1-0.9 = 0.1
Divide by 2: 0.1/2 = 0.05
Subtract from 1: 1-0.05 = 0.95
Using a z-table (http://www.z-table.com) we see that this is directly between two z-scores, 1.64 and 1.65; we will use 1.645:
To find the confidence interval, we use:
We first find the z-value associated with this. To do this:
Convert 90% to a decimal: 90% = 90/100 = 0.9
Subtract from 1: 1-0.9 = 0.1
Divide by 2: 0.1/2 = 0.05
Subtract from 1: 1-0.05 = 0.95
Using a z-table (http://www.z-table.com) we see that this is directly between two z-scores, 1.64 and 1.65; we will use 1.645: