A body mass index of a healthy twenty-year-old male should be around 25. A group of...
A body mass index of a healthy twenty-year-old male should be around 25. A group of 51 randomly selected twenty-year-old male engineering majors found that their mean body mass index for the sample was 27 with a standard deviation of 6. is this a observational study or controlled experiment?
Homework Answers
Here the researcher is not applying any treatment on the subjects, he is just measuring the BMI. Hence,
It is an observational study.
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A body mass index of a healthy twenty-year-old male should be
around 25. A group of...
For the population of 30 year-old men who later develop diabetes mellitus, the distribution of body...
For the population of 30 year-old men who later develop diabetes mellitus, the distribution of body mass index is approximately normal with unknown mean mu and standard deviation sigma. A sample of 25 30 year-old men who later developed diabetes mellitus had a sample mean body mass index of 25.0 kg/m2 and a sample standard deviation of 2.6 kg/m2. Estimate the mean body mass index, of the population of 30 year-old men who later developed diabetes mellitus, with the 95%...
Researchers were interested in estimating the mean body mass index (BMI) for 5 year old girls in a very large school dis...
Researchers were interested in estimating the mean body mass index (BMI) for 5 year old girls in a very large school district in Oklahoma. A random sample of size 61 five year old girls was drawn, and the sample mean BMI was found to be 17.4. Although BMI measurements are typically a little right-skewed, because of the reasonably large sample size, the researchers felt it was reasonable to use procedures based on the normal distribution. Based on previous information, they...
Researchers were interested in estimating the mean body mass index (BMI) for 5 year old girls in a very large school dis...
Researchers were interested in estimating the mean body mass index (BMI) for 5 year old girls in a very large school district in Oklahoma. A random sample of size 70 five year old girls was drawn, and the sample mean BMI was found to be 17.4. Although BMI measurements are typically a little right-skewed, because of the reasonably large sample size, the researchers felt it was reasonable to use procedures based on the normal distribution. Based on previous information, they...
Please Show work. Thanks. 5. Twenty-nine randomly selected women had their Body Mass Indices (BMI) measured....
Please Show work. Thanks.
5. Twenty-nine randomly selected women had their Body Mass Indices (BMI) measured. The sample standard deviation was 7.6 points. Assume the BMI's are normally distributed. With an error of 2.4 points, construct a 80% confidence interval for the population standard deviation, o. Round to tenths and write a sentence answer.
A 13-year-old female adolescent comes to the pediatric clinic, and her body mass index (BMI) is...
A 13-year-old female adolescent comes to the pediatric clinic,
and her body mass index (BMI) is found to be 21. Compare the
adolescent’s BMI to the body mass index–for–age percentiles for
girls age 2 to 20 years and determine what percentile this
adolescent falls under. Record your answer using a whole
number.
Confidence Intervals Example: Body Temperature What is the mean body temperature of a healthy human? According...
Confidence Intervals Example: Body Temperature What is the mean body temperature of a healthy human? According to your thermometer it is probably 98.6° F. A study to estimate the mean healthy body temperature produced the following results for 93 randomly selected healthy subjects. TEMP 98 97 98 98 98 98 98 97 97 98 98.1 98 98 98 97 97 97 98 97 98 97 97.1 98 98 97 96 96 98 98 98.8 98 98.8 98.8 97.6 97 98...
1. (15 Marks) The following are body mass index (BMI) scores measured in 11 patients who...
1. (15 Marks) The following are body mass index (BMI) scores measured in 11 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of weight in kilograms to height in meters squared 25, 27, 31, 28, 28, 41, 24, 32, 46, 35 and 40 Find the following a) Mean (I point) b) Meclion (1 point) c) Range (1 point) d) Lower Quartile (Q) (1 point)...
Question 5 (12 marks) Suppose the body mass index (BMI) of Australian males follows a normal distribution with a mean (µ) of 25 and a standard deviation (σ) of 4. Consider a randomly chosen Australian...
Question 5 (12 marks) Suppose the body mass index (BMI) of Australian males follows a normal distribution with a mean (µ) of 25 and a standard deviation (σ) of 4. Consider a randomly chosen Australian male. (a) Calculate the probability that his BMI is less than 22. [2 marks] (b) Calculate the probability that his BMI is between 22 and 29. [3 marks] (c) Below which level would we find the lowest 5% of BMI for Australian males? [3 marks]...
Hoekema et al. (A-3) studied craniofacial morphology of patients diagnosed with obstructive sleep apnea syndrome (OSAS) in healthy male subjects. One of the demographic variables the researchers collected for all subjects was the Body Mass Index (BMI, cal
Hoekema et al. (A-3) studied craniofacial morphology of patients diagnosed with obstructive sleep apnea syndrome (OSAS) in healthy male subjects. One of the demographic variables the researchers collected for all subjects was the Body Mass Index (BMI, calculated by dividingweight in kg by the square of the patients’ height in cm). The following are the BMI values of 29OSAS subjects.33.57 27.78 33.34 29.01 26.86 54.33 24.21 31.49 34.4241.50 24.54 41.75 24.49 43.23 29.07 28.21 21.54 27.7431.44 30.08 40.81 47.78 28.99...
The body mass index (variable BMI) provides an indication of a person’s level of body fat as follows: healthy weight, 20–25; overweight, >25–30; obese, greater than 30. Excess body weight is, of co...
The body mass index (variable BMI) provides an indication of a
person’s level of body fat as follows: healthy weight, 20–25;
overweight, >25–30; obese, greater than 30. Excess body weight
is, of course, related to diet, but, in turn, what we eat de- pends
on who we are in terms of culture and our en- tire life experience.
Based on an analysis using mean weight, can you conclude that white
people have a healthy weight? Can you conclude that based...
Please Show work. Thanks.
5. Twenty-nine randomly selected women had their Body Mass Indices (BMI) measured. The sample standard deviation was 7.6 points. Assume the BMI's are normally distributed. With an error of 2.4 points, construct a 80% confidence interval for the population standard deviation, o. Round to tenths and write a sentence answer.
Confidence Intervals Example: Body Temperature What is the mean body temperature of a healthy human? According to your thermometer it is probably 98.6° F. A study to estimate the mean healthy body temperature produced the following results for 93 randomly selected healthy subjects. TEMP 98 97 98 98 98 98 98 97 97 98 98.1 98 98 98 97 97 97 98 97 98 97 97.1 98 98 97 96 96 98 98 98.8 98 98.8 98.8 97.6 97 98...
1. (15 Marks) The following are body mass index (BMI) scores measured in 11 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of weight in kilograms to height in meters squared 25, 27, 31, 28, 28, 41, 24, 32, 46, 35 and 40 Find the following a) Mean (I point) b) Meclion (1 point) c) Range (1 point) d) Lower Quartile (Q) (1 point)...
The body mass index (variable BMI) provides an indication of a
person’s level of body fat as follows: healthy weight, 20–25;
overweight, >25–30; obese, greater than 30. Excess body weight
is, of course, related to diet, but, in turn, what we eat de- pends
on who we are in terms of culture and our en- tire life experience.
Based on an analysis using mean weight, can you conclude that white
people have a healthy weight? Can you conclude that based...
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