Homework Answers
Question 4: From box plots it is observed that the length (=3rd quartile-1st quartile) of 4 boxes are significantly different hence
Option: There is evidence that the standard deviations are not equal in the four populations.
Question 1: We use ANOVA to determine whether there are any statistically significant differences between the means of more than two independent or unrelated groups.
So
Option: We compare hours working at a job for high school student athletes in three sports (basketball, track and soccer)
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Researchers examine the relationship between mother's education level and hours spent on homework each week for...
A researcher wished to compare the average amount of time spent in extracurricular activities by high...
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that in a school district of a large city. The researcher obtained a simple random sample of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be 6 hours with a standard deviation of 3 hours. The researcher also obtained an independent simple...
QUESTION 10 Studies suggest that there is a strong correlation between GPA and weekly hours spent...
QUESTION 10 Studies suggest that there is a strong correlation between GPA and weekly hours spent studying for high school students. A random sample of 30 high school students produced the following linear regression results for predicting GPA from hours spent studying: Regression Statistics R Square 0.650 Observations 30 Intercept Hours Coefficients 0.976 0.226 Select the correct labels for the variables GPA and hours spent studying in this setting. O Hours spent studying is the response variable and GPA is...
Gender HeartRate male 70 male 71 male 74 male 80 male 73 male 75 male 82...
Gender HeartRate
male 70
male 71
male 74
male 80
male 73
male 75
male 82
male 64
male 69
male 70
male 68
male 72
male 78
male 70
male 75
male 74
male 69
male 73
male 77
male 58
male 73
male 65
male 74
male 76
male 72
male 78
male 71
male 74
male 67
male 64
male 78
male 73
male 67
male 66
male 64
male 71
male 72
male 86
male 72...
The General Social Survey is an annual survey given to a random selection of about 1500...
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" We're interested in examining whether or not there are differences in the typical work week length based on the level of education of the worker....
4. (Four parts; 13 marks in total) A study was conducted to assess the effect of...
4. (Four parts; 13 marks in total) A study was conducted to assess the effect of gender on average math SAT scores for students applying to a particular math department. The "effect" of gender (or the gender effect) on average math SAT score is defined as the difference in average math SAT score between males and females (um -up). Assume all the required assumptions are satisfied. a) (2 marks) Referring to the output in Tables 1 and 2 below, is...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
Future Time Orientation and Condom Use for AIDS Prevention Background Notes: Researchers administered questionnaires to male college students taking an introductory psychology course. Among ot...
Future Time Orientation and Condom Use for AIDS
Prevention
Background Notes: Researchers administered questionnaires to
male college students taking an introductory psychology course.
Among other things, they measured future time orientation defined
as planning ahead for future events and willingness to delay
gratification. (Sample item: “I believe that a person’s day should
be planned ahead.”) Based on the scores on the future time
orientation scale, they split the male students into two groups –
one low in future orientation and...
SOC364/L - Social Statistics @ CSUN w Godard Homework #5: Confidence intervals & Samples Sizes This...
SOC364/L - Social Statistics @ CSUN w Godard Homework #5: Confidence intervals & Samples Sizes This assignment need not be typed but must be legible. (The instructor is the arbiter of legibility.) Be as complete as possible in your answers. On this and all assignments, put all answers in prose form (sentences and paragraphs); single-word or phrase answers are not sufficient. Be explicit and complete in explaining your answers. Show all work done, including any calculations, & explain all of...
i need help on question 3 to 22 please. Midterm ex review. MATH 101 Use the...
i need help on question 3 to 22 please.
Midterm ex review. MATH 101 Use the following information to answer the next four exercises. The midterm grades on a chemistry exam, graded on a scale of 0 to 100, were: 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76,78, 78, 81, 82, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100, 100,740 1. Do you see any outliers in this data? If so, how would...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male t...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male teachers. She picks a random sample by picking a random sample of schools, in the schools picked, picking a random sample of departments, and in the departments picked, picking a random sample of teachers. What kind of sampling was performed? d) voluntary response e) cluster b) stratified Random...
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that in a school district of a large city. The researcher obtained a simple random sample of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be 6 hours with a standard deviation of 3 hours. The researcher also obtained an independent simple...
QUESTION 10 Studies suggest that there is a strong correlation between GPA and weekly hours spent studying for high school students. A random sample of 30 high school students produced the following linear regression results for predicting GPA from hours spent studying: Regression Statistics R Square 0.650 Observations 30 Intercept Hours Coefficients 0.976 0.226 Select the correct labels for the variables GPA and hours spent studying in this setting. O Hours spent studying is the response variable and GPA is...
Gender HeartRate
male 70
male 71
male 74
male 80
male 73
male 75
male 82
male 64
male 69
male 70
male 68
male 72
male 78
male 70
male 75
male 74
male 69
male 73
male 77
male 58
male 73
male 65
male 74
male 76
male 72
male 78
male 71
male 74
male 67
male 64
male 78
male 73
male 67
male 66
male 64
male 71
male 72
male 86
male 72...
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" We're interested in examining whether or not there are differences in the typical work week length based on the level of education of the worker....
4. (Four parts; 13 marks in total) A study was conducted to assess the effect of gender on average math SAT scores for students applying to a particular math department. The "effect" of gender (or the gender effect) on average math SAT score is defined as the difference in average math SAT score between males and females (um -up). Assume all the required assumptions are satisfied. a) (2 marks) Referring to the output in Tables 1 and 2 below, is...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
Future Time Orientation and Condom Use for AIDS
Prevention
Background Notes: Researchers administered questionnaires to
male college students taking an introductory psychology course.
Among other things, they measured future time orientation defined
as planning ahead for future events and willingness to delay
gratification. (Sample item: “I believe that a person’s day should
be planned ahead.”) Based on the scores on the future time
orientation scale, they split the male students into two groups –
one low in future orientation and...
SOC364/L - Social Statistics @ CSUN w Godard Homework #5: Confidence intervals & Samples Sizes This assignment need not be typed but must be legible. (The instructor is the arbiter of legibility.) Be as complete as possible in your answers. On this and all assignments, put all answers in prose form (sentences and paragraphs); single-word or phrase answers are not sufficient. Be explicit and complete in explaining your answers. Show all work done, including any calculations, & explain all of...
i need help on question 3 to 22 please.
Midterm ex review. MATH 101 Use the following information to answer the next four exercises. The midterm grades on a chemistry exam, graded on a scale of 0 to 100, were: 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76,78, 78, 81, 82, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100, 100,740 1. Do you see any outliers in this data? If so, how would...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male teachers. She picks a random sample by picking a random sample of schools, in the schools picked, picking a random sample of departments, and in the departments picked, picking a random sample of teachers. What kind of sampling was performed? d) voluntary response e) cluster b) stratified Random...
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