State whether each situation has independent or paired (dependent) samples.a. A researcher wants to know whether men and women at a particular office have different mean credit ratings. She gathers two random samples (one of credit ratings from 50 men and the other from 50 women.)b. A researcher wants to know whether couples have different mean credit ratings. He collects a sample of couples and has each person report his or her credit rating.a. Choose the correct answer below.Paired (dependent) samplesIndependent samplesb. Choose the correct answer below.Paired (dependent) samplesIndependent samples Using data from a national health survey, researchers looked at the pulse rate for nearly 800 people to see whether it is plausible that men and women have the same population mean. The data are random and independent. Technology output isshown in the accompanying table. Complete parts (a) through (c) below.Click the icon to view the technology output.a. Are the conditions for using a confidence interval for the difference between two means met? Select all that apply.A. Yes, all conditions are met.B. No, the Large Samples condition does not hold.C. No, the Independent Samples condition does not hold.D. No, the Random Samples and Independence condition does not hold.b. State the interval in a clear and correct sentence. Complete the sentence below.that thein pulse rate (women minus men) is betweenandbeats per minute.(Type integers or decimals. Do not round. Use ascending order.)c. Does the interval capture 0? Explain what that shows.The interval for the difference0. This implies that itplausible that

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State whether each situation has independent or paired (dependent) samples. a. A researcher wants to know whether men and women at a particular office have different mean credit ratings. She gathers two random samples (one of credit ratings from 50 men and the other from 50 women.) b. A researcher wants to know whether couples have different mean credit ratings. He collects a sample of couples and has each person report his or her credit rating. a. Choose the correct answer below. O Paired (dependent) samples O Independent samples b. Choose the correct answer below. Paired (dependent) samples O Independent samples

State whether each situation has independent or paired (dependent) samples. a. A researcher wants to know whether men and women at a particular office have different mean credit ratings. She gathers two random samples (one of credit ratings from 50 men and the other from 50 women.) b. A researcher wants to know whether couples have different mean credit ratings. He collects a sample of couples and has each person report his or her credit rating. a. Choose the correct answer below. O Paired (dependent) samples O Independent samples b. Choose the correct answer below. Paired (dependent) samples O Independent samples

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

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.

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Question

State whether each situation has independent or paired (dependent) samples.
a. A researcher wants to know whether men and women at a particular office have different mean credit ratings. She gathers two random samples (one of credit ratings from 50 men and the other from 50 women.)
b. A researcher wants to know whether couples have different mean credit ratings. He collects a sample of couples and has each person report his or her credit rating.
a. Choose the correct answer below.
Paired (dependent) samples
Independent samples
b. Choose the correct answer below.
Paired (dependent) samples
Independent samples

Using data from a national health survey, researchers looked at the pulse rate for nearly 800 people to see whether it is plausible that men and women have the same population mean. The data are random and independent. Technology output is
shown in the accompanying table. Complete parts (a) through (c) below.
Click the icon to view the technology output.
a. Are the conditions for using a confidence interval for the difference between two means met? Select all that apply.
A. Yes, all conditions are met.
B. No, the Large Samples condition does not hold.
C. No, the Independent Samples condition does not hold.
D. No, the Random Samples and Independence condition does not hold.
b. State the interval in a clear and correct sentence. Complete the sentence below.
that the
in pulse rate (women minus men) is between
and
beats per minute.
(Type integers or decimals. Do not round. Use ascending order.)
c. Does the interval capture 0? Explain what that shows.
The interval for the difference
0. This implies that it
plausible that

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