2. A scientist is studying the effect ofexercise on blood pressure. He studies20 people who exercise 5 hours perweek and 20 people who do notexercise. He compares the bloodpressures of the two groups at thebeginning and after three months.This is an example of a(n):Answer choices:sample survey.observational study.experiment. 1. A scientist is studying the effect ofexercise on blood pressure. He studies50 people who exercise regularly to findout whether their blood pressures arelow, average, or high.This is an example of a(n):Answer choices:sample survey.observational study.experiment.

An observational study is a study where a researcher uses observed information to learn or study…

Answered: 2. A scientist is studying the effect…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

What is the first Quartile of the data below: 3 5 3 9 2 9 10
Please give correct answer ASAP Example 5: A local college is interested in knowing if the proportion of high school students taking a fourth year of math is greater for students in suburban schools than in rural schools. To help answer this question, the college obtains a random sample of 500 senior students from suburban school districts and a random sample of 450 senior students from rural school districts across the country. The survey reveals that, of the 500 suburban students, 323 are taking a fourth year of math while only 279 of the 450 rural students are taking a fourth year of math. Is there evidence to suggest that the proportion of seniors taking a fourth year of math in suburban school districts is greater than the proportion of seniors taking a fourth year of math in rural school districts at the 5% level?
= ✓ D A local bank wants to study waiting times of customers. A sample of four customers is selected on successive days, and the time is measured from the point each customer enters the line to when he or she reaches the teller window. The results are shown in the data table. a. Construct a control chart for x. b. Is the process within statistical control? Click the icon to view the data. Click the icon to view a table of control chart factors. a. Construct a control chart for x. Choose the correct graph below. O A. 10- mw Sample b. Select the correct choice. Q LCL 20 3 4 5 6 7 8 9 10 Table of Control Chart Factors Table 14-2 Control Chart Constants R Chart n: Number of Observations in Subgroup 2 D₂ 0.000 0.000 0.000 2.282 0.000 2.114 0.000 2.004 0.076 0.136 0.184 0.223 B. D₂ 3.267 2.574 10- 1.924 1.864 1.816 1.777 Print Sample A. No, because there is at least one point lying outside of the region between the upper and lower control limits. x Chart A₂ 1.880 1.023 0.729 0.577 0.483…
You are testing a claim about a population proportion of 0.23. Find the test statistic given the following sample results:sample proportion: 0.22sample size:800Round to the fourth.
Is the amount of sodium (in milligrams) in brand-name cereals the same as the amount of sodium in generic cereals? The sodium content in milligrams from a random sample of some brand-name cereals is given in the table below. Brand-Name: x=139.92 , s=61.24 , n=21 Generic: x=154.33 , s=73.87 , n=24 Is there a difference between the sodium content in generic and brand-name cereals? Use a significance level of 0.10. hypothesis test is needed
Find the statistical technique to be used and final answer.
Consider the data set given in the accompanying table. Complete parts (a) through (c). E Click the icon to view the data table. (a) Draw a scatter diagram treating x as the explanatory variable an Data Table - X below. O A. OB. Ay OD. Ax -2 -1 1 y - 2 5. Print Done Click to select your answer and then click Check Answer. Check Answer Clear All 2 parts remaining acer %
help
Stephanie is trying to figure out the sample size of an experiment. She knows the population SD is 41.5 and the SD of the sample averages is 2.7. What is the sample size of the experiment?
A school board would like to determine whether there is a difference in average SAT scores for students at one high school versus another high school in the district. To check, they take a simple random sample of 100 students from each high school. A. Is the data paired?
A hydrologist is interested in studying the influence of rainfall on runoff in a drainage basin. Rainfall and runoff are measured during 20 rainfall events. Model the relationship. What is the sample size for this study? 20 2 18 14 degrees of freedom.
A study was done to look at the relationship between number of lovers college students have had in their lifetimes and their GPAs. The results of the survey are shown below. Lovers 4 8 3 7 0 6 5 6 GPA 2.7 2.3 3.4 2.4 3.5 2.9 2.7 2.8 r2r2 = (Round to two decimal places) Interpret r2r2 : There is a large variation in students' GPAs, but if you only look at students who have had a fixed number of lovers, this variation on average is reduced by 80%. Given any group of students who have all had the same number of lovers, 80% of all of these studetns will have the predicted GPA. 80% of all students will have the average GPA. There is a 80% chance that the regression line will be a good predictor for GPA based on the number of lovers a student has had. The equation of the linear regression line is: ˆyy^ = + xx (Please show your answers to two decimal places) Use the model to predict the GPA of a college student who as had 7 lovers.GPA = (Please round your…

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS