Researchers wanted to determine if there was an association between daily cantaloupe consumption and the occurrence of high cholesterolhigh cholesterol.The researchers looked at 93 comma 17393,173 women and asked them to report their cantaloupe-eatingeating habits. The researchers also determined which of the women had high cholesterolhigh cholesterol. After their analysis, the researchers concluded that consumption of two or more servingstwo or more servings of cantaloupecantaloupe per day was associated with a reduction in high cholesterolhigh cholesterol. Complete parts (a) through (c) below. (a) What type of observational study was this? Explain. A. This was a cross-sectional study because all information about the individuals was collected at a specific point in time. B. This was a cohort study because it identified a group of individuals to participate in the study and observed the group over a long period of time. C. This was a case-control study because individuals that had a certain characteristic were matched with those that did not. (b) What is the response variable in the study? Is the response variable qualitative or quantitative? What is the explanatory variable? A. The response variable is consumption of cantaloupe.The response variable is quantitative. B. The response variable is the number of individuals who participate in the study who eat two or more servingstwo or more servings of cantaloupe per day. The response variable is quantitative. C. The response variable is the number of individuals who participate in the study. The response variable is quantitative. D. The response variable is whether the woman has high cholesterol or not. The response variable is qualitative. What is the explanatory variable? A. The explanatory variable is whether the woman has high cholesterol or not. B. The explanatory variable is the number of individuals who participate in the study. C. The explanatory variable is the number of individuals who participate in the study who eateat two or more servings of cantaloupe per day. D. The explanatory variable is consumption of cantaloupe (c) In their report, the researchers stated that "After adjusting for various demographic and lifestyle variables, daily consumption of two or more servings was associated with a 30% reduced prevalence of high cholesterol."Why was it important to adjust for these variables? A. The researchers wanted to ensure that the study was representative of the entire population, so they were likely to adjust the responses to match actual data collected for the entire population. B. The researchers wanted to ensure that the sample was large enough in order to perform inference. C. The researchers may be concerned with confounding that occurs when the effects of two or more explanatory variables are not separated or when there are some explanatory variables that were not considered in a study, but that affect the value of the response variable. D. The researchers were sure that various demographic and lifestyle variables had greater influence than daily consumption of two or more servings

Researchers wanted to determine if there was an association between daily cantaloupe consumption and the occurrence of high cholesterolhigh cholesterol.The researchers looked at 93 comma 17393,173 women and asked them to report their cantaloupe-eatingeating habits. The researchers also determined which of the women had high cholesterolhigh cholesterol. After their analysis, the researchers concluded that consumption of two or more servingstwo or more servings of cantaloupecantaloupe per day was associated with a reduction in high cholesterolhigh cholesterol. Complete parts (a) through (c) below. (a) What type of observational study was this? Explain. A. This was a cross-sectional study because all information about the individuals was collected at a specific point in time. B. This was a cohort study because it identified a group of individuals to participate in the study and observed the group over a long period of time. C. This was a case-control study because individuals that had a certain characteristic were matched with those that did not. (b) What is the response variable in the study? Is the response variable qualitative or quantitative? What is the explanatory variable? A. The response variable is consumption of cantaloupe.The response variable is quantitative. B. The response variable is the number of individuals who participate in the study who eat two or more servingstwo or more servings of cantaloupe per day. The response variable is quantitative. C. The response variable is the number of individuals who participate in the study. The response variable is quantitative. D. The response variable is whether the woman has high cholesterol or not. The response variable is qualitative. What is the explanatory variable? A. The explanatory variable is whether the woman has high cholesterol or not. B. The explanatory variable is the number of individuals who participate in the study. C. The explanatory variable is the number of individuals who participate in the study who eateat two or more servings of cantaloupe per day. D. The explanatory variable is consumption of cantaloupe (c) In their report, the researchers stated that "After adjusting for various demographic and lifestyle variables, daily consumption of two or more servings was associated with a 30% reduced prevalence of high cholesterol."Why was it important to adjust for these variables? A. The researchers wanted to ensure that the study was representative of the entire population, so they were likely to adjust the responses to match actual data collected for the entire population. B. The researchers wanted to ensure that the sample was large enough in order to perform inference. C. The researchers may be concerned with confounding that occurs when the effects of two or more explanatory variables are not separated or when there are some explanatory variables that were not considered in a study, but that affect the value of the response variable. D. The researchers were sure that various demographic and lifestyle variables had greater influence than daily consumption of two or more servings

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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Concept explainers

Question

100%

Complete parts (a) through (c) below.

(a) What type of observational study was this? Explain.

This was a cross-sectional study because all information about the individuals was collected at a specific point in time.

This was a cohort study because it identified a group of individuals to participate in the study and observed the group over a long period of time.

This was a case-control study because individuals that had a certain characteristic were matched with those that did not.

(b) What is the response variable in the study? Is the response variable qualitative or quantitative? What is the explanatory variable?

The response variable is consumption of cantaloupe.The response variable is quantitative.

The response variable is the number of individuals who participate in the study who

eat two or more servingstwo or more servings of cantaloupe per day. The response variable is quantitative.

The response variable is the number of individuals who participate in the study. The response variable is quantitative.

The response variable is whether the woman has high cholesterol or not. The response variable is qualitative.

What is the explanatory variable?

The explanatory variable is whether the woman has high cholesterol or not.

The explanatory variable is the number of individuals who participate in the study.

The explanatory variable is the number of individuals who participate in the study who

eateat

two or more servings of cantaloupe per day.

The explanatory variable is consumption of

cantaloupe

(c) In their report, the researchers stated that "After adjusting for various demographic and lifestyle variables, daily consumption of two or more servings was associated with a 30% reduced prevalence of high cholesterol."
Why was it important to adjust for these variables?

The researchers wanted to ensure that the study was representative of the entire population, so they were likely to adjust the responses to match actual data collected for the entire population.

The researchers wanted to ensure that the sample was large enough in order to perform inference.

The researchers may be concerned with confounding that occurs when the effects of two or more explanatory variables are not separated or when there are some explanatory variables that were not considered in a study, but that affect the value of the response variable.

The researchers were sure that various demographic and lifestyle variables had greater influence than daily consumption of two or more servings

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