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Take a Test- Andrea Montgomery-Google Chrome Secure | https://www.mathal.com/Student/PlayerTestaspx?testld-167153937&centerwin-yes; MAT135C01 Intro to Statistics: MA1 FA17 (Dale Blake) Test: Module 4 Test (Chapters 8, 9, 10, 11) Time Remaining: 02.55 32 Submit Test This Question: 1 pt 140120 (0 complete) This Test: 20 pts possible A survey asked. How many tattos do you currenty have on your bodyr Of the 1218 males surveyed, 199 responded that they had at least one tattoo. Of the 1019 females surveyed, 141 responded that they had at least one tattoo Construct a 95% tattoo differs significantly from the proportion of females that have at least one tatoo. Interpret the intervall Let p, represent the proportion of males with tattoos and p2 represent the proportion of females with tattoos. confidence interval to judge whether the propo ton of maesht have at least oo The 95% confidence interval for p1-p2 is OD Round to three decimal places as needed) Interpret the interval A. There is a 95% probabilty that the difference of the proportions is it interval Conclude that there isa significant diference ithe proportion of males and OB There is 95% confidence that h differenceofthep tesisin e ional C nude hat te eisis ken evidence or a spea dfeeente O c. There is a 95% probability that the difference of the proportions is n the interval C females that have at least one tattoo proportion of males and females that have at least one tattoo proportion of males and females that have at least one tattoo females that have at least one tattoo. fidence that the difference of the proportions is in the interval Conclude thart there is a signifcen ifference in the proportion of males and Click to select your answers)

Explanation / Answer

The statistical software output for this problem is:

Two sample proportion summary confidence interval:
p1 : proportion of successes for population 1
p2 : proportion of successes for population 2
p1 - p2 : Difference in proportions

95% confidence interval results:

Hence,

95% confidence interval will be: (-0.005, 0.055)

Interpretation: Option B is correct.

Difference Count1 Total1 Count2 Total2 Sample Diff. Std. Err. L. Limit U. Limit p1 - p2 199 1218 141 1019 0.025011643 0.015140189 -0.0046625821 0.054685867

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