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Ray Of Light [21]
2 years ago
12

In a study of 225 adults, the average heart rate was 72 beats per minute. Assume the population of heart rates is known to be ap

proximately normal, with a standard
deviation of 10 beats per minute. What does a margin of error of 1.1 for the 90% confidence interval of the average beats per minute mean?
Mathematics
2 answers:
irinina [24]2 years ago
6 0

Answer:

it means that if the survey is repeated there is a 90% chance that the average heart rate is 72 bears per minute with plus or minus 1.1 %

Step-by-step explanation:

Confidence interval explains to what percentage will the result be true if the experiment is repeated multiple times

Margin of error tells the range of accuracy if the result is true when the experiment is repeated multiple times.

Inessa [10]2 years ago
5 0
I think it’s like the root
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Answer:

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Step-by-step explanation:

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vivado [14]

Answer:

angle1=70

angle2=65

angle4=115

angle7=45

angel6=45

angle5=45

Step-by-step explanation:

110+angle1 = 180

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angle1 = 70

115+angle2=180

angle2=180-115

angle2=65

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angle1+angle2+angle7=180 because triangle

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135+angle7=180

angle7=180-135

angle7=45

angel6=45

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8 0
2 years ago
Please help me find perimeter and area of this figure rounded to the nearest whole number! I will award brainliest!
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7 0
2 years ago
Solve each multiplication problem, use the cancellation method if possible, and reduce your answers. a. 39⁄64 × 8⁄13 b. 2⁄3 × 1⁄
blsea [12.9K]

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7 0
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jolli1 [7]

Answer:

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Step-by-step explanation:

I dont know  how to explain but it is correct

4 0
2 years ago
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