Interpret the output.

How many observations of water samples are in the file? ____316____

How many samples were contaminated? ____40______

What proportion (rounded to three decimal places) was contaminated? _____0.127__

How many standard deviations above the hypothesized proportion (.035) is the proportion of contaminated samples? ________

4)If airplane water was contaminated at the same rate (3.5%) as drinking water in general, what would be the probability of obtaining a sample proportion as larger or larger than the one they obtained from 316 observations? ________

5)What conclusion would you draw about the null hypothesis?Do you have sufficient evidence against it, or not?

One sample proportion hypothesis test: Outcomes in: Contaminated Success : 1 p : Proportion of successes HO : p = 0.035 H A : p > 0035 Hypothesis test results: Variable Count Total Sample Prop. Std. Err. ZStat Pvalue Contaminated 40 316 012658228 0010338419 88584412 {00001 3) Interpret the output. 0 How many observations of water samples are in the file? _316_ 0 How many samples were contaminated? 40 0 What proportion (rounded to three decimal places) was contaminated? 0.127_ 0 How many standard deviations above the hypothesized proportion (.035) is the proportion of contaminated samples? 4) If airplane water was contaminated at the same rate (3.5%) as drinking water in general, what would be the probability of obtaining a sample proportion as larger or larger than the one they obtained from 316 observations? 5) What conclusion would you draw about the null hypothesis? Do you have sufficient evidence against it, or not