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Reporting Two-Sample Z-Test For Proportions

Reporting a two sample z test for proportions

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Reporting a two sample z test for proportions

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Page 1: Reporting a two sample z test for proportions

Reporting Two-Sample Z-Test For Proportions

Page 2: Reporting a two sample z test for proportions

Template

Page 3: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion]

Page 4: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage]

Page 5: Reporting a two sample z test for proportions

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[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage] is statistically significantly

Page 6: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage] is statistically significantly [insert “different”, “higher”, “lower”, “more”, “less”, etc.] [insert the dependent variable]

Page 7: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage] is statistically significantly [insert “different”, “higher”, “lower”, “more”, “less”, etc.] [insert the dependent variable] than

Page 8: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage] is statistically significantly [insert “different”, “higher”, “lower”, “more”, “less”, etc.] [insert the dependent variable] than [insert a description of the other sample proportion],

Page 9: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage] is statistically significantly [insert “different”, “higher”, “lower”, “more”, “less”, etc.] [insert the dependent variable] than [insert a description of the other sample proportion], z = 0.00, p = .000.

Page 10: Reporting a two sample z test for proportions

Template

[insert a description of a sample proportion] [Insert the result in terms of a proportion or a percentage] is statistically significantly [insert “different”, “higher”, “lower”, “more”, “less”, etc.] [insert the dependent variable] than [insert a description of the other sample proportion], z = 0.00, p = .000.

Page 11: Reporting a two sample z test for proportions

Here is an example problem:

Page 12: Reporting a two sample z test for proportions

Here is an example problem:

In a small town in Massachusetts, a town well supplied water that was contaminated by industrial chemicals to the west side residents but not to the east side residents, because they used a different well.

Page 13: Reporting a two sample z test for proportions

Here is an example problem:

In a small town in Massachusetts, a town well supplied water that was contaminated by industrial chemicals to the west side residents but not to the east side residents, because they used a different well. During that period of time a sample of 414 births on the west side showed 16 birth defects and a sample of 228 births on the east side showed 3 birth defects.

Page 14: Reporting a two sample z test for proportions

Here is an example problem:

In a small town in Massachusetts, a town well supplied water that was contaminated by industrial chemicals to the west side residents but not to the east side residents, because they used a different well. During that period of time a sample of 414 births on the west side showed 16 birth defects and a sample of 228 births on the east side showed 3 birth defects. A law suit is pending against the city for negligence.

Page 15: Reporting a two sample z test for proportions

Here is an example problem:

In a small town in Massachusetts, a town well supplied water that was contaminated by industrial chemicals to the west side residents but not to the east side residents, because they used a different well. During that period of time a sample of 414 births on the west side showed 16 birth defects and a sample of 228 births on the east side showed 3 birth defects. A law suit is pending against the city for negligence. How strong is their evidence statistically?

Page 16: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”

Page 17: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”Step 2 – “had statistically significantly” [insert “different”, “higher”, “lower”,

“more”, “less” etc.] “had statistically significantly more”

Page 18: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”Step 2 – “had statistically significantly” [insert “different”, “higher”, “lower”,

“more”, “less” etc.] “had statistically significantly more”

Step 3 - [insert the dependent variable]“birth defects”

Page 19: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”Step 2 – “had statistically significantly” [insert “different”, “higher”, “lower”,

“more”, “less” etc.] “had statistically significantly more”

Step 3 - [insert the dependent variable]“birth defects”

Step 4 – [Insert the result in terms of a proportion or a percentage](.04)

Page 20: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”Step 2 – “had statistically significantly” [insert “different”, “higher”, “lower”,

“more”, “less” etc.] “had statistically significantly more”

Step 3 - [insert the dependent variable]“birth defects”

Step 4 – [Insert the result in terms of a proportion or a percentage](.04)

Step 5 – “than” [insert a description of the other sample proportion],“than residents who were not exposed to the contaminated water”

Page 21: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”Step 2 – “had statistically significantly” [insert “different”, “higher”, “lower”,

“more”, “less” etc.] “had statistically significantly more”

Step 3 - [insert the dependent variable]“birth defects”

Step 4 – [Insert the result in terms of a proportion or a percentage](.04)

Step 5 – “than” [insert a description of the other sample proportion],“than residents who were not exposed to the contaminated water”

Step 6 – insert z statistic“z = 2.35”

Page 22: Reporting a two sample z test for proportions

Step 1 - [insert a description of a sample proportion]“Residents who were exposed to water contaminated with

industrial chemicals”Step 2 – “had statistically significantly” [insert “different”, “higher”, “lower”,

“more”, “less” etc.] “had statistically significantly more”

Step 3 - [insert the dependent variable]“birth defects”

Step 4 – [Insert the result in terms of a proportion or a percentage](.04)

Step 5 – “than” [insert a description of the other sample proportion],“than residents who were not exposed to the contaminated water”

Step 6 – insert z statistic“z = 2.35”

Step 7 – insert p value“p = .001

Page 23: Reporting a two sample z test for proportions

Final Two-Sample Z-Test Report:

Page 24: Reporting a two sample z test for proportions

Final Two-Sample Z-Test Report:

Residents who were exposed to water contaminated with industrial chemicals had statistically significantly more birth defects (.04) than residents who were not exposed to the contaminated water. z = 2.35, p = .001.

Page 25: Reporting a two sample z test for proportions

Residents who were exposed to water contaminated with industrial chemicals had statistically significantly more birth defects (.04) than residents who were not exposed to the contaminated water. z = 2.35, p = .001.