Answered: This year’s water pollution readings at…

Name: This year’s water pollution readings at State Park Beach seem to be lo
Uploaded: 2024-03-20T07:07:12.000Z
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Description: 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: 3.6 3.9 3.3 3.4 3.8 3.7 3.5 3.6 3.7 3.6 3.6 3.7

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.5: Interpreting Data

Problem 1C

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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:

3.6 3.9 3.3 3.4 3.8 3.7 3.5 3.6 3.7 3.6

3.6 3.7 3.9 3.8 3.7 4.0 3.7 3.5 3.8 3.6

3.5 3.6 3.5 3.7 3.6 3.9 3.9 3.7 3.6 3.5

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.

Find the sample mean and standard deviation. Round to two decimal places.

= [M]

s = [S]

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