Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of 310 adults who suffer from sleep apnea, it was found that 155 had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). LOADING... Click here to view the standard normal distribution table (page 2). LOADING... Click here to view the table of critical t-values. LOADING... (a) What does it mean for this study to be cross-sectional? A. The data were obtained at a specific point in time and the study was an experiment. B. The data were obtained over the course of time and the study was an observational study. C. The data were obtained over the course of time and the study was an experiment. D. The data were obtained at a specific point in time and the study was an observational study. Your answer is correct. (b) What is the variable of interest in this study? Is it qualitative or quantitative? Explain. Identify the variable of interest. Choose the correct answer below. A. Whether a person has gum disease or not. B. Whether a person with sleep apnea has gum disease or not. Your answer is correct. C. Whether a person has sleep apnea or not. D. The proportion of gum disease present in those with sleep apnea. Determine whether the variable in question is qualitative or quantitative. Choose the correct answer below. A. Qualitative—the variable classifies the individuals in the study. Your answer is correct. B. Quantitative—the variable can be numerically measured. C. Quantitative—the variable classifies the individuals in the study. D. Qualitative—the variable can be numerically measured. (c) Estimate the proportion of individuals who suffer from sleep apnea who have gum disease with 90% confidence. Interpret your result. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) A. There is 90% confidence that the population proportion of individuals who suffer from sleep apnea who have gum disease is between nothing and nothing. B. There is a 90% chance that the true population proportion of individuals who suffer from sleep apnea who have gum disease is between nothing and nothing. C. 90% of the population lies in the interval between and

Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of 310 adults who suffer from sleep apnea, it was found that 155 had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). LOADING... Click here to view the standard normal distribution table (page 2). LOADING... Click here to view the table of critical t-values. LOADING... (a) What does it mean for this study to be cross-sectional? A. The data were obtained at a specific point in time and the study was an experiment. B. The data were obtained over the course of time and the study was an observational study. C. The data were obtained over the course of time and the study was an experiment. D. The data were obtained at a specific point in time and the study was an observational study. Your answer is correct. (b) What is the variable of interest in this study? Is it qualitative or quantitative? Explain. Identify the variable of interest. Choose the correct answer below. A. Whether a person has gum disease or not. B. Whether a person with sleep apnea has gum disease or not. Your answer is correct. C. Whether a person has sleep apnea or not. D. The proportion of gum disease present in those with sleep apnea. Determine whether the variable in question is qualitative or quantitative. Choose the correct answer below. A. Qualitative—the variable classifies the individuals in the study. Your answer is correct. B. Quantitative—the variable can be numerically measured. C. Quantitative—the variable classifies the individuals in the study. D. Qualitative—the variable can be numerically measured. (c) Estimate the proportion of individuals who suffer from sleep apnea who have gum disease with 90% confidence. Interpret your result. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) A. There is 90% confidence that the population proportion of individuals who suffer from sleep apnea who have gum disease is between nothing and nothing. B. There is a 90% chance that the true population proportion of individuals who suffer from sleep apnea who have gum disease is between nothing and nothing. C. 90% of the population lies in the interval between and

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of

310

adults who suffer from sleep apnea, it was found that

155

had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below.

Click here to view the standard normal distribution table (page 1).

Click here to view the standard normal distribution table (page 2).

Click here to view the table of critical t-values.

(a) What does it mean for this study to be cross-sectional?

The data were obtained at a specific point in time and the study was an experiment.

The data were obtained over the course of time and the study was an observational study.

The data were obtained over the course of time and the study was an experiment.

The data were obtained at a specific point in time and the study was an observational study.

Your answer is correct.

(b) What is the variable of interest in this study? Is it qualitative or quantitative? Explain. Identify the variable of interest. Choose the correct answer below.

Whether a person has gum disease or not.

Whether a person with sleep apnea has gum disease or not.

Your answer is correct.

Whether a person has sleep apnea or not.

The proportion of gum disease present in those with sleep apnea.

Determine whether the variable in question is qualitative or quantitative. Choose the correct answer below.

Qualitative—the

variable classifies the individuals in the study.

Your answer is correct.

Quantitative—the

variable can be numerically measured.

Quantitative—the

variable classifies the individuals in the study.

Qualitative—the

variable can be numerically measured.

90%

confidence. Interpret your result. Select the correct choice below and fill in the answer boxes to complete your choice.

(Use ascending order. Round to three decimal places as needed.)

There is

90%

confidence that the population proportion of individuals who suffer from sleep apnea who have gum disease is between

nothing

and

nothing.

There is a

90%

chance that the true population proportion of individuals who suffer from sleep apnea who have gum disease is between

nothing

and

nothing.

90%

of the population lies in the interval between

and

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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