The FloridaLakes dataset describes characteristic of water samples taken at random Florida lakes. Acidity (pH) is...
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. The following two problems are based on this dataset. Problem 1 This problem...
4. 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. with a pH less than 7 are acidic while solutions with a pH greater than 7 are basic or alkaline. A rcher Jim Lee would like to know whether on average the solutions in Florlida lakes are acidic. In order to test whether on average the solutions in Florida lakes...
t est to gather oation. The outut of this What is the p-value of this test? What is the conclusion? (3 credins) Assume that the distribution of the pH Sevel is normal with ox1.20. Test 7 uing a twotaled test (significance level 001). (4 creds) n.:μ " 7 verm / μ c) Assume that the distribution of the pH level is normal with σ120. Test p7 versus H:p <7 using a one-tailed test (significance level 0.01). (3 credits) As in...
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 or basic or alkaline. A random sample of lakes in Florida was taken and the pH was recorded for each lake. Summary statistics are given below. The primary question to answer is: "Is there evidence to indicate the mean pH...
8 a) ttest hwage 30 One-sample t test Variable l Obs Mean Std. Err. Std. Dev. [95% Conf. Interval] 175 33.52778 1.73398 22.9384 30.10544 36.95012 mean mean(hwage) t 2.0345 Ho: mean-30 degrees of freedom174 Ha: mean<30 Ha: mean !-30 Ha: mean>30 Pr(T <t) 0.9783 Pr(ITI Itl) 0.0434 Pr(T>t) 0.0217 Mean Std. Err. (95% Conf. Interval] hwage 33.52778 1.73398 38.18544 36.95812 . summarize hwage Variable I Obs Mean Std. Dev Min Max hwage 175 33.52778 22.9384 2.051282 149.1966 . return list...
2. [20 marks] Fresh water from rivers and lakes varies in acidity/alkalinity depending on the rocks and soils it runs over. Granite country yields water that is slightly acidic, while water from limestone country is slightly alkaline. Acidity and alkalinity are measured on a pH scale, on which 7 is neutral, values below 7 are acidic and values above 7 are alkaline. pH can change due to pollution or due to waste from biomass such as algae. A certain river,...
19. Do orange trees in California produce more oranges than those in Florida? Twenty orange trees were randomly selected in California and another twenty in Florida. Use the SPSS output below to answer questions a-d. Write the correct answer on the line next to the question's number Group Statistics Stale N Mean Std. Deviation Std. Error Mean 7 810 .746 3499 est OrangesPerTree CA 20 98.45 FL 15.649 Levene's Test for Equaity of Variances -Hest for Equality of Means 95%...
Using the dataset that you used for the midterm (Find it on the Blackboard), do the following: 1) (4 points) Submit the values for items a to e in the table below: mean, sample size, standard deviation, and 95% confidence interval for mean. (SPSS Command: Analyze/Descriptive Statistics/Explore) Variable Statistic Height Mean 71.2 Sample Size N 999 Standard Deviation 2.913 95% Confidence Interval for Mean Lower Bound 71.02 Upper Bound 71.38 2) (4 points) Assume that you want to test whether...
Please break down each part ( a, b, c and d) in detail. Thank you where price: house prioe; assess: the assessed housing value (before the house was sold); lotaize: size of the lot, in feet; agrft: square footage; and bdrms: number of bedrooms. The econometrician uses Stats 'reg' command, Le., uses OLS estimation, to get the following results: 5s df Mode1 6.13852904 16 Total8.01760352 87092156362 iprice Number of obs " FC 1, 6 280,94 Prob R-squared0.7656 Adj R-squared "...
hrice-A' + β, ๒(asses) + ln(lotsize) + β3 ln(agrft) + β.bdmns + น where price: house price assess : the assessed housing value (before the house was sold); lotsize : size of the lot, in feet; sgr ft: square footage; and bdrms : number of bedrooms. The econometrician uses Stata 'reg' command, i.e, uses OLS estimation, to get the following results: sumber of abs - F 1, 6)280.94 1 6.13852904 Prob > F 0.0000 R-squared 0.7656 dj R-squared 0.7629 14782...