Suppose that the average resting heart rate for men over 19 years old is 70 beats per minute (bpm) with a standard deviation of 8 bpm. A college is concerned that external stressors are causing their students' resting heart rates to rise. Before hiring a consultant, the college decided to obtain samples from 75 male students to see if the average resting heart rate was abnormal. The college discovered that the students' average resting heart rate was 72 after conducting the study. What are the chances that a group of 75 male students has a resting heart rate of 72 or higher? Is the outcome unusual? Discuss the study's findings. Why is it important to maintain a healthy heart rate? Give some examples of how to maintain a healthy heart rate.
Added by Meagan S.
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First, we need to calculate the z-score, which measures how many standard deviations a particular value is from the mean. In this case, the mean resting heart rate for men is 70 bpm, and the standard deviation is 8 bpm. The formula for calculating the z-score Show moreā¦
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An individualās resting heart rate (RHR) will vary among adults because of factors such as age, body size, cardiovascular fitness, smoking, disease, air temperature, and emotional state. For adults, the normal resting heart rate will usually range between 60 and 100 beats per minute. According to a recent study, the average RHR of 46-55 year-old adult females living in Canada is 72.0 beats per minute (bpm) with a standard deviation of 4.4. A Canadian female in this age group is randomly selected and found to have an RHR of 70 bpm. Calculate the z-score associated to the resting heart rate of this individual. Round your answer to two decimal places.
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Problem # 1 Assume that the normal heart rate for males over 20 years of age is 70 bpm (beats per minutes) with a standard deviation of 8 bpm. Answer the following questions: a) What is the probability that a randomly selected male 20 years of age or older has a heart rate greater than 83 bpm? b) A certain University is concerned that external sources are adding sources of "stress" in their students, therefore the heart rate has increased. A study was carried out in which 75 male students were randomly selected to determine if they presented a normal heart rhythm. The study revealed a heart rate of 72 bpm. What is the probability that the selected sample of 75 male students will show a heart rate greater than 72 bpm? Comment on these results (are they expected?).
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