This year\'s water pollution readings at State Park Beach seem to be lower than

Question

This year's water pollution readings at State Park Beach seem to be lower than last year. A sample of 30 readings was randomly selected from this year's daily readings: Researchers want to know if this is sufficient evidence to conclude that the mean of this year's pollution readings is significantly lower than last year's mean of 3.8. If the p-value is less than 0.0001, what is your decision (let alpha = 0.05)? Retain H_0 Reject H_0 This year's water pollution readings at State Park Beach seem to be lower than last year. A sample of 30 readings was randomly selected from this year's daily readings: Researchers want to know if this is sufficient evidence to conclude that the mean of this year's pollution readings is significantly lower than last year's mean of 3.8. What is the proper summary statement? The sample data suggest that the average pollution level is higher than that of last year.

Explanation / Answer

Question 5.

P-value < 0.05, i.e 0.0001 < 0.05, Therefore Reject Ho at 5% level of significance.

ANSWER: Reject Ho

Question 6

The sample data suggest that the average pollution level is Lower than that of last year.

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