Question

In a study of 205 adults, the average heart rate was 75 beats per minute. Assume the population of heart rates is known to be approximately normal, with a standard deviation of 8 beats per minute. What does a margin of error of 1.1 for the 95% confidence interval of the average beats per minute mean? There is a 95% chance that the population mean is between 67 and 83 beats per minute. There is a 95% chance that the population mean is between 73.9 and 76.1 beats per minute. There is a 5% chance that the population mean is less than 75 beats per minute. There is a 5% chance that the population mean is more than 75 beats per minute.

Answer 1

Answer:if its a test:

The answer is B :)))))

If its work:

73.9-76.1

What is the 95% confidence interval for the mean beats per minute?

Formula: z = 1.96 at  95% confidence interval

Step-by-step explanation:#need any questions answered within secs/mins, hit me up and I got you

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Answer 2

Answer:

The answer is B

Step-by-step explanation: