Homework Answers
1) In order to compare propositions of more than two data sets, chi square goodness of fit test is used. Here, there are categorical data to compare between three groups. So, the answer for this question is 2-variable chi square test (option 6).
2) In order to compare the quantitative data (mean) between two groups, t test is used. So, the answer for this question is 2-sample t test (option 5).
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One hundred random mud samples were taken from a lake bottom in order to determine whether...
For each of the following questions, please identify the appropriate statistical technique to use to answer...
For each of the following questions, please identify the appropriate statistical technique to use to answer the scientific question posed. Use the same set of answers for every question. a) 1-sample z test for proportions d) 2-sample z test for proportions g) correlation analysis b) 1-sample t test e) 2-sample t test h) linear regression c) 1-variable chi-square test f) 2-variable chi-square test 19. Alcoholism is hypothesized to lead to brain damage. A computer assisted tomography (CAT) scan was conducted...
Chronic obstructive pulmonary disease (COPD) is a lung disease that makes it difficult for people to...
Chronic obstructive pulmonary disease (COPD) is a lung disease that makes it difficult for people to breathe, since small airways in their lungs become blocked. This can make patients gasp for breath or breathe at a higher than usual rate to try to get oxygen. A common treatment for this problem is to have patients breathe oxygen through breathing tubes. We have a sample of COPD patients who naturally breathe at the same rate. Each patient walks on a treadmill...
Which Test those cases should use? A: one sample z-test B: one-sample t-test C: t-test for the...
Which Test those cases should use? A: one sample z-test B: one-sample t-test C: t-test for the difference between means for two related samples D: t-test for the difference between means for two independent samples with homogeneity of variance E: t-test for the difference between means for two independent samples with heterogeneity of variance F: a one sample z-test for proportions (or a chi-square goodness of fit) G: chi-square goodness of fit only (where a one sample z-test of proportions isn’t appropriate) H: a two-sample z-test...
Question 10 Background: Name That Scenario: Pet Adoption One important aspect in statistics is to understand...
Question 10 Background: Name That Scenario: Pet Adoption One important aspect in statistics is to understand which statistical methods or procedures are appropriate to use to address the research problem or question of interest. For each description of a research question below, select the one corresponding statistical analysis technique most appropriate for addressing that research question. An employee who has just been put in charge of the pet adoption fundraiser thinks that a personal phone cal to recent adopters asking...
Two random samples were found, one from Japan and one from Scotland. The sample variances were...
Two random samples were found, one from Japan and one from Scotland. The sample variances were found for both samples. The sample variance for Japan 2.247 and the sample variance for Scotland was 0.624. Test the claim that the population variance for Scottish companies is lower than that of Japanese companies. The P-value was found to be 0.0388. Use a 5% level of significance. (Do Not Perform The Tests! Just answer the following) a) Write the null and alternative hypothesis...
Independent random samples of size n1=38 and n2=86 observations, were selected from two populations. The samples...
Independent random samples of size n1=38 and n2=86 observations, were selected from two populations. The samples from populations 1 and 2 produced x1=18 and x2=13 successes, respectively. Define p1 and p2 to be the proportion of successes in populations 1 and 2, respectively. We would like to test the following hypotheses: H0:p1=p2 versus H1:p1≠p2 (a)To test H0 versus H1, which inference procedure should you use? A. Two-sample z procedure B. One-sample z procedure C. One-sample t procedure D. Two-sample t...
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...
A medical researcher wants to determine whether a drug changes the body’s temperature. Seven test subjects...
A medical researcher wants to determine whether a drug changes the body’s temperature. Seven test subjects are randomly selected, and the body temperature (in degrees Fahrenheit) of each is measured. The subjects are then given the drug and after 20 minutes, the body temperature of each is measured again. The results are listed below. Use significance level α = 0.05, and we assume that the body temperatures are normally distributed. Show your work space provided below: t-Test: Paired Two Sample...
please answer questions clearly Part 3: Which Test Should You Use? scenarios. Your task is to determine which statistical test is most appropriate a), and to explain why you chose that statistic...
please answer questions clearly
Part 3: Which Test Should You Use? scenarios. Your task is to determine which statistical test is most appropriate a), and to explain why you chose that statistical test (part b). Consider things variables, scores vs. frequencies, number of groups, and what we know (or don not Below are 8 research Directions: Below are8 to test each research like continuous vs. nominal know) about various populations Your which statistical test to use. There are 12 options...
Two random samples were drawn from members of the U.S. Congress. One sample was taken from members who are Democrats and the other from members who are Republicans. For each sampl...
Two random samples were drawn from members of the U.S. Congress. One sample was taken from members who are Democrats and the other from members who are Republicans. For each sample, the number of dollars spent on federal projects in each congressperson's home district was recorded on in Home Districts Less than S to 10 More than 5 Billion Billion 10 biltion Party Row Total Republicarn Column Total 92 (0) Make a cluster bar graph showing the percentages of Congress...
For each of the following questions, please identify the appropriate statistical technique to use to answer the scientific question posed. Use the same set of answers for every question. a) 1-sample z test for proportions d) 2-sample z test for proportions g) correlation analysis b) 1-sample t test e) 2-sample t test h) linear regression c) 1-variable chi-square test f) 2-variable chi-square test 19. Alcoholism is hypothesized to lead to brain damage. A computer assisted tomography (CAT) scan was conducted...
Question 10 Background: Name That Scenario: Pet Adoption One important aspect in statistics is to understand which statistical methods or procedures are appropriate to use to address the research problem or question of interest. For each description of a research question below, select the one corresponding statistical analysis technique most appropriate for addressing that research question. An employee who has just been put in charge of the pet adoption fundraiser thinks that a personal phone cal to recent adopters asking...
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...
please answer questions clearly
Part 3: Which Test Should You Use? scenarios. Your task is to determine which statistical test is most appropriate a), and to explain why you chose that statistical test (part b). Consider things variables, scores vs. frequencies, number of groups, and what we know (or don not Below are 8 research Directions: Below are8 to test each research like continuous vs. nominal know) about various populations Your which statistical test to use. There are 12 options...
Two random samples were drawn from members of the U.S. Congress. One sample was taken from members who are Democrats and the other from members who are Republicans. For each sample, the number of dollars spent on federal projects in each congressperson's home district was recorded on in Home Districts Less than S to 10 More than 5 Billion Billion 10 biltion Party Row Total Republicarn Column Total 92 (0) Make a cluster bar graph showing the percentages of Congress...
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