Are Florida Lakes Acidic or Alkaline? The pH of a liquid is a measure of its acidity or alkalinity. Pure water has a pH of 7, which is neutral. Solutions with a pH less than 7 am acidic while solutions with a pH greater than 7 are basic, or alkaline. The dataset Florida Lakes gives information, including pH values for a sample of lakes in Florida. Computer output of descriptive statistics for the pH variable is shown: Descriptive Statistics: pH Variable N N° Mean pH SE Mean 6.591 0.177 1.288 53 0 Click here for the dataset associated with this question. n= Enter the exact answers. X= 11 StDev Minimum Q1 Median 3.600 5.800 6.800 03 (a) How many lakes are included in the dataset? What is the mean pH value? What is the standard deviation? 7.450 Maximum 9.100

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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Chapter11: Data Analysis And Displays
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Are Florida Lakes Acidic or Alkaline?
The pH of a liquid is a measure of its acidity or alkalinity. 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 dataset Florida Lakes gives information, including pH values,
for a sample of lakes in Florida. Computer output of descriptive statistics for the pH variable is shown:
Descriptive Statistics: pH
Variable N N*
pH
53 0
n=
x=
SE
Mean
6.591 0.177
Click here for the dataset associated with this question.
Enter the exact answers.
S=
Mean
O E
e Textbook and Media
StDev Minimum QI Median
1.288
(a) How many lakes are included in the dataset? What is the mean pH value? What is the standard deviation?
BE
3
5.800
3.600
6.800
C
F9
03
Maximum
7:450 9.100
F10
F13
F12
Transcribed Image Text:Are Florida Lakes Acidic or Alkaline? The pH of a liquid is a measure of its acidity or alkalinity. 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 dataset Florida Lakes gives information, including pH values, for a sample of lakes in Florida. Computer output of descriptive statistics for the pH variable is shown: Descriptive Statistics: pH Variable N N* pH 53 0 n= x= SE Mean 6.591 0.177 Click here for the dataset associated with this question. Enter the exact answers. S= Mean O E e Textbook and Media StDev Minimum QI Median 1.288 (a) How many lakes are included in the dataset? What is the mean pH value? What is the standard deviation? BE 3 5.800 3.600 6.800 C F9 03 Maximum 7:450 9.100 F10 F13 F12
(b) Use the descriptive statistics above to conduct a hypothesis test to determine whether there is evidence that average pH in
Florida lakes is different from the neutral value of 7.
State the null and alternative hypotheses.
O Ho: H = 7 vs HA: μ # 7
O Ho: H =
O Ho: H =
O Ho: H =
O Ho: H =
6.591 vs HA:μ # 6.591
7 vs H₁: H > 7
6.591 vs HA: μ<6.591
7 VS HA: H <7
Transcribed Image Text:(b) Use the descriptive statistics above to conduct a hypothesis test to determine whether there is evidence that average pH in Florida lakes is different from the neutral value of 7. State the null and alternative hypotheses. O Ho: H = 7 vs HA: μ # 7 O Ho: H = O Ho: H = O Ho: H = O Ho: H = 6.591 vs HA:μ # 6.591 7 vs H₁: H > 7 6.591 vs HA: μ<6.591 7 VS HA: H <7
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