p robability & s tatistics course review. p opulations and s amples each week, the gallup poll...

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PROBABILITY & STATISTICS Course Review

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Page 1: P ROBABILITY & S TATISTICS Course Review. P OPULATIONS AND S AMPLES Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to

PROBABILITY & STATISTICSCourse Review

Page 2: P ROBABILITY & S TATISTICS Course Review. P OPULATIONS AND S AMPLES Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to

POPULATIONS AND SAMPLES

Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to determine national opinion on a wide variety of issues.

Page 3: P ROBABILITY & S TATISTICS Course Review. P OPULATIONS AND S AMPLES Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to

SAMPLING BIAS

Page 4: P ROBABILITY & S TATISTICS Course Review. P OPULATIONS AND S AMPLES Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to

NON-SAMPLING BIAS

Page 5: P ROBABILITY & S TATISTICS Course Review. P OPULATIONS AND S AMPLES Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to

UNBIASED SAMPLING TECHNIQUES69051 64817 87174

0951784534 06489 87201

97245

Rachel Nadine Sade ShavonteJulian Keith Brooks AranaCandace Trey Jordan KellyImani Aharon Lucas SteliosTravis Anthony Tariq WillXavier Chelsea Bennie

Page 6: P ROBABILITY & S TATISTICS Course Review. P OPULATIONS AND S AMPLES Each week, the Gallup Poll questions a sample of about 1500 adult U.S. residents to

TYPES OF STUDIES

Survey

Observational Study

Experiment