Homework Answers
Question 47
Pearson r correlations is used to check significance of correlation between resuls of IQ test and Test A scores
And t test are used for checking significance of population mean. Also used for testing significance of diffrence in means.
Question 48
Here we have check whether young adults in city is related to number of burglaries incity or not.
That is we have to check correlation between number of young adults in the city and number of burglaries in the city
So Pearson r correlation is used.
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Question 47 1 pts What statistical procedure will solve this problem? Find if there is a...
Question 34 1 pts What statistical procedure will solve this problem? Two fifth grade teachers want...
Question 34 1 pts What statistical procedure will solve this problem? Two fifth grade teachers want to know if their students memorize their multiplication better in the morning or in the afternoon. They matched their students by age. Below are the scores on a quiz given to each student. Group 1 Morning: 80, 80, 76, 89, 95, 97,85, 89, 99,99 Group 2 Afternoon: 65, 65, 65, 70, 73, 80, 70, 71, 63, 62 Pearson r correlations O dependent O independentt
What statistical procedure will solve this problem? A sample of 20 Bengal tigers raised in a...
What statistical procedure will solve this problem? A sample of 20 Bengal tigers raised in a farm in Las Vegas was selected to measure the tails. The result was a mean length of 104 cm with a standard deviation of 7.4 cm. According to the scientific magazine Wild Animals, the population mean for the tail lengths of Bengal tigers in South Africa is 110 cm. Is this sample significantly different than the population? one sample z one samplet Question 39...
Question 33 1 pts Find the standard error of the difference for y. 4.772 0.795 Undetermined...
Question 33 1 pts Find the standard error of the difference for y. 4.772 0.795 Undetermined O 1.560 Question 34 1 pts What statistical procedure will solve this problem? Two fifth grade teachers want to know if their students memorize their multiplication better in the morning or in the afternoon. They matched their students by age. Below are the scores on a quiz given to each student. Group 1 Morning: 80, 80, 76, 89, 95, 97, 85, 89, 99,99 Group...
please answer all question (2-5) thanks Question 2 1 pts As the number of hours a...
please answer all question (2-5) thanks
Question 2 1 pts As the number of hours a student studies increases, the number of errors made on the exam decreases. There is a strong relationship between these variables. Select the value for the pearson correlation (r) that would be appropriate 0-0.7 0-0.4 o 0.6 o 1.0 Question 3 1 pts The following APA summary was reported for a one-sample t-test (two-tailed, alpha = .05). t(15) = 3.3, p = .003 Which of...
please answer all questions : 6-8 Question 6 1 pts A researcher examines the relationship between...
please answer all questions : 6-8
Question 6 1 pts A researcher examines the relationship between an individual's adjustment to becoming a parent and his/her age, while removing the influence of financial status. What procedure would allow such an analysis? o mixed correlation o split-half reliability o spurious correlation o partial correlation MULTIPLE CHOICE - 2 POINTS EACH Question 7 2 pts A researcher is interested in whether there are significant differences between men and women and religious preferences. In...
Questions 2, 5, 8 and 9 Paused Apps M Gmail YouTube Maps Question 2 0.5 pts...
Questions 2, 5, 8 and 9
Paused Apps M Gmail YouTube Maps Question 2 0.5 pts For a simple linear regression, the standardized regression coefficient (Beta) is: O equal to the Pearson correlation coefficient. unrelated to the correlation value. O the square root of the slope. O the square of the r statistic. 1 pts Question 3 Question 5 0.5 pts If the standard error of the estimate is zero, the relation between two variables is: perfect imperfect curvilinear. unknown...
Please answer all Question 24 1 pts Solve the problem. A 90% confidence interval for the...
Please answer all
Question 24 1 pts Solve the problem. A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a random survey of 45 CEOs. The interval was to make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width? O Decrease the sample size and decrease the confidence level....
please answer all question 16-20 Question 16 2 pts The population mean for a standardized test...
please answer all question 16-20
Question 16 2 pts The population mean for a standardized test is 250. A research study with N = 30 adults from Virginia had a mean score of 260, with a 95% confidence interval of the mean reported as [248, 272]. What decision should be made based on this confidence interval? o Run the hypothesis test again o Accept the research hypothesis o Reject the null hypothesis o Fail to reject the null hypothesis Question...
Question 13 4 pts Solve the problem. Find F '(x) if Flx)= dt Question 14 4...
Question 13 4 pts Solve the problem. Find F '(x) if Flx)= dt Question 14 4 pts Find the domain and range and describe the level curves for the function f(xy). fix. y)-25-2 O Domain all points in the xy-plane; range real numbers 0szs S; level curves: circles with centers at (0.0) and radi r,0<rs5 Domain all points in the xy-plane satistyingx2 y2s25;range: real numbers 0 szs 5: level curves: circles with centers at (0.0) and radi r. 0crs5 O...
Please answer all questions Question 30 1 pts Solve the problem. To help consumers assess the...
Please answer all questions
Question 30 1 pts Solve the problem. To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has recently been marketed. The FDA tests on this cigarette yielded mean nicotine content of 24.4 milligrams and standard deviation of 2.2 milligrams for a sample of r9 cigarettes. Construct a 95% confidence interval for the mean nicotine content...
Question 34 1 pts What statistical procedure will solve this problem? Two fifth grade teachers want to know if their students memorize their multiplication better in the morning or in the afternoon. They matched their students by age. Below are the scores on a quiz given to each student. Group 1 Morning: 80, 80, 76, 89, 95, 97,85, 89, 99,99 Group 2 Afternoon: 65, 65, 65, 70, 73, 80, 70, 71, 63, 62 Pearson r correlations O dependent O independentt
What statistical procedure will solve this problem? A sample of 20 Bengal tigers raised in a farm in Las Vegas was selected to measure the tails. The result was a mean length of 104 cm with a standard deviation of 7.4 cm. According to the scientific magazine Wild Animals, the population mean for the tail lengths of Bengal tigers in South Africa is 110 cm. Is this sample significantly different than the population? one sample z one samplet Question 39...
Question 33 1 pts Find the standard error of the difference for y. 4.772 0.795 Undetermined O 1.560 Question 34 1 pts What statistical procedure will solve this problem? Two fifth grade teachers want to know if their students memorize their multiplication better in the morning or in the afternoon. They matched their students by age. Below are the scores on a quiz given to each student. Group 1 Morning: 80, 80, 76, 89, 95, 97, 85, 89, 99,99 Group...
please answer all question (2-5) thanks
Question 2 1 pts As the number of hours a student studies increases, the number of errors made on the exam decreases. There is a strong relationship between these variables. Select the value for the pearson correlation (r) that would be appropriate 0-0.7 0-0.4 o 0.6 o 1.0 Question 3 1 pts The following APA summary was reported for a one-sample t-test (two-tailed, alpha = .05). t(15) = 3.3, p = .003 Which of...
please answer all questions : 6-8
Question 6 1 pts A researcher examines the relationship between an individual's adjustment to becoming a parent and his/her age, while removing the influence of financial status. What procedure would allow such an analysis? o mixed correlation o split-half reliability o spurious correlation o partial correlation MULTIPLE CHOICE - 2 POINTS EACH Question 7 2 pts A researcher is interested in whether there are significant differences between men and women and religious preferences. In...
Questions 2, 5, 8 and 9
Paused Apps M Gmail YouTube Maps Question 2 0.5 pts For a simple linear regression, the standardized regression coefficient (Beta) is: O equal to the Pearson correlation coefficient. unrelated to the correlation value. O the square root of the slope. O the square of the r statistic. 1 pts Question 3 Question 5 0.5 pts If the standard error of the estimate is zero, the relation between two variables is: perfect imperfect curvilinear. unknown...
Please answer all
Question 24 1 pts Solve the problem. A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a random survey of 45 CEOs. The interval was to make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width? O Decrease the sample size and decrease the confidence level....
please answer all question 16-20
Question 16 2 pts The population mean for a standardized test is 250. A research study with N = 30 adults from Virginia had a mean score of 260, with a 95% confidence interval of the mean reported as [248, 272]. What decision should be made based on this confidence interval? o Run the hypothesis test again o Accept the research hypothesis o Reject the null hypothesis o Fail to reject the null hypothesis Question...
Question 13 4 pts Solve the problem. Find F '(x) if Flx)= dt Question 14 4 pts Find the domain and range and describe the level curves for the function f(xy). fix. y)-25-2 O Domain all points in the xy-plane; range real numbers 0szs S; level curves: circles with centers at (0.0) and radi r,0<rs5 Domain all points in the xy-plane satistyingx2 y2s25;range: real numbers 0 szs 5: level curves: circles with centers at (0.0) and radi r. 0crs5 O...
Please answer all questions
Question 30 1 pts Solve the problem. To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has recently been marketed. The FDA tests on this cigarette yielded mean nicotine content of 24.4 milligrams and standard deviation of 2.2 milligrams for a sample of r9 cigarettes. Construct a 95% confidence interval for the mean nicotine content...
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