# Chapter 1. Finding Normal Proportions

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Stat Tutor
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0:36

### Question 1.1

Incorrect. We use either the Standard Normal table or statistical software to find areas for a Normal distribution.
Correct. We use either the Standard Normal table or statistical software to find areas for a Normal distribution.
Incorrect. Try again.
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1:40

### Question 1.2

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Incorrect. A cumulative proportion is the area to the left.
Correct. A cumulative proportion is the area to the left.
Incorrect. Try again.
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### Question 1.3

OJQAYMrr6PPCH1Sr6SOLStXAQQskYYppKjsiOw6b4FgEmrdqUIpltZRWefvsu8CbQ04eocLBaKnq2gqmxhjOnHst0IN0KluO+Oi9SLTMFsKVi4+fNml2R2qrkb35ci/AgDYUQKIMwSculz088AH5sDQxPfHdSdofGyRNjvhL3h1trbaBZgRd9/aAhhl8w7FmqCD+ZFPIeTRBkiLgN5yKAsDg4XHDnizi16CySfAHiK2Mp83PIo+gvxfs5kBj514MLlpauJM1BS/s4R4TVTGya8sY/T7qzHpdsXm4rpF/zZQqPphtx7OAlcL6sy8=
Incorrect. Since the Standard Normal table gives cumulative proportions, we need to match the area we want with a cumulative proportion.
Correct. Since the Standard Normal table gives cumulative proportions, we need to match the area we want with a cumulative proportion.
Incorrect. Try again.
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3:05

### Question 1.4

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Incorrect. A cumulative proportion gives area on the left. To find area on the right, we subtract the cumulative area from 1.0.
Correct. A cumulative proportion gives area on the left. To find area on the right, we subtract the cumulative area from 1.0.
Incorrect. Try again.
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4:38

### Question 1.5

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Incorrect. Since the Standard Normal table gives cumulative areas for z-scores, we must first find the z-score corresponding to the x-value.
Correct. Since the Standard Normal table gives cumulative areas for z-scores, we must first find the z-score corresponding to the x-value.
Incorrect. Try again.
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