The FloridaLakes dataset describes characteristic of water samples taken at rand

Question

The FloridaLakes dataset describes characteristic of water samples taken at random Florida lakes. Acidity (pH) is given for each lake. Pure water has a pH of 7, which is neutral. Solutions with a pH less than 7 are acidic while solutions with a pH greater than 7 are basic or alkaline. The researchers would like to know whether on average the solutions in Florida lakes are acidic. (1) (2 points) The output of a certain step in the statistical analysis is given below. What are the name and purpose of this test? Shapiro-Wilk W test for normal data Variable Prob z Obs 0.881 0.272 0.60706 0.98211 53 (2) (2 points) What is the conclusion of the test above? Why? How does the conclusion affect the one sample T procedure? One-sample t test Variable Obs Mean. Sta. Err Sta. Dev 1993 Conf Interval 6.590566 1769821 6.117363 7.063769 1.288449 53 mean mean (ph) 2.3134 Ho mean 7 52 degrees of freedom Ha mean K 7 Ha mean 7 Ha mean 7 Pr (T t) 0.0123 Pr (ITI It 0.0247 Pr (T t) 0.9877

Explanation / Answer

Dear student,

According to Chrgg guidelines only the first 4 subparts are answered.

1,

The name of the test is Shapiro Milk W test. The purpose of the test is to test the normality of the data.

2, The conclusion is,"The data is normally distributed."

And in the place of t test Ztest can be used.

3, 53

4 , 6.590566

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