Homework Answers
The null and alternative hypotheses in this scenario is:
Ho: Housing performance and academic performance are not related (Independent).
Ha: Housing performance and academic performance are related (not Independent).
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An educational researcher wishes to know if there is a difference in academic performance for college...
need help asap An educational researcher wishes to know if there is a difference in academic...
need help asap
An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 385 students. Can we conclude that freshman housing location and academic performance are related? Location On campus off campus Total Average Below Average Above Average Total 108 124 124 356 27 29 135 125 125 385 1 1 Copy Data Step 4 of 8: Find the value of...
A researcher wishes to find if the maximum voluntary ventilation value for apparently healthy college seniors...
A researcher wishes to find if the maximum voluntary ventilation
value for apparently healthy college seniors is greater 100 liters
per minute. A sample of 20 healthy college seniors yielded the
following values. ¯X=135,s=50.2. Let =0.01. Assume
that the maximum voluntary ventilation is normally distributed.
What are the assumptions met by the data?
What is the null hypothesis?
What is the alternative hypothesis?
What is the test statistic used?
What is the critical value of the test statistic?
What is...
Another researcher was interested in examining academic performance among teenage students. However, based on her literature...
Another researcher was interested in examining academic
performance among teenage students. However, based on her
literature review, she expected that ethnicity, parental support,
and stress level would predict academic performance. Further, her
study was based in New York.
Therefore, she collected data from one hundred and fifty (150)
students from a school in New York. She hypothesized that parental
support would positively predict academic performance, while stress
would negatively predict academic performance. She also
hypothesized that ethnicity would predict academic...
3) Suppose you are an educational researcher who wishes to examine the effect of a school...
3) Suppose you are an educational researcher who wishes to examine the effect of a school district's class size on its student achievement. Specifically, you are interested in whether in the U.S., on average, school districts with smaller class sizes perform differently on test scores than school districts with larger class sizes. To test this, you have conducted two surveys. The first survey randomly sampled 238 school districts with small class sizes. This survey found a sample average test score...
A researcher wishes to know if the data she has collected provide sufficient evidence to indicate...
A researcher wishes to know if the data she has collected provide sufficient evidence to indicate a difference in mean serum uric acid level between normal individuals and individuals with Down' s syndrome. The data consist of serum uric acid readings on 12 individuals with Downâ€s syndrome and 15 normal individuals. The mean serum uric acid for individuals with Down's syndrome is 4.5 mg/100 ml and SD = 1 and the mean serum uric acid level for normal individuals is...
A researcher wishes to know if the data she has collected provide sufficient evidence to indicate...
A researcher wishes to know if the data she has collected provide sufficient evidence to indicate a difference in mean serum uric acid level between normal individuals and individuals with Down’s syndrome. The data consist of serum uric acid readings on 12 individuals with Down’s syndrome and 15 normal individuals. The mean serum uric acid for individuals with Down’s syndrome is 4.5 mg/100 ml and SD = 1 and the mean serum uric acid level for normal individuals is 3.4...
Please help this is my last problem! A researcher wants to study the relationship between salary...
Please help this is my last problem!
A researcher wants to study the relationship between salary and gender. She randomly selects 400 individuals and determines their salary and gender. Can the researcher conclude that salary and gender are dependent? Male Female Total Below $25,000 50 38 88 $25,000 $50,000 38 31 69 $50,000-$75,000 50 85 135 Above $75,000 62 46 108 200 200 400 Income Total Copy Data Step 5 of 8: Find the degrees of freedom associated with the...
1. A college admissions director wishes to estimate the mean age of all students currently enrolled....
1. A college admissions director wishes to estimate the mean age of all students currently enrolled. In a random sample of 81 students, the mean age is found to be 20.51 years. From past studies, the standard deviation of the population is known to be 2 years, and the population is normally distributed. Construct a 99% confidence interval of the population mean age. (10 p) (Round off final answers to two decimal places, if appropriate. Do not round off numbers...
NEED QUICK will thumbs up! A political researcher wishes to know if political affiliation and age...
NEED QUICK will thumbs up! A political researcher wishes to know if political affiliation and age are related. He has collected data on 409 persons in three age categories. Is there evidence that age and political affiliation are related? Age Democrat Republican Independent Total 18-31 61 57 34 152 32-51 59 63 29 151 52-68 40 43 23 106 Total 160 163 86 409 Step 1: State the null and alternative hypothesis. H0H0: political affiliation and age are dependent HaHa:...
need help asap
An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 385 students. Can we conclude that freshman housing location and academic performance are related? Location On campus off campus Total Average Below Average Above Average Total 108 124 124 356 27 29 135 125 125 385 1 1 Copy Data Step 4 of 8: Find the value of...
A researcher wishes to find if the maximum voluntary ventilation
value for apparently healthy college seniors is greater 100 liters
per minute. A sample of 20 healthy college seniors yielded the
following values. ¯X=135,s=50.2. Let =0.01. Assume
that the maximum voluntary ventilation is normally distributed.
What are the assumptions met by the data?
What is the null hypothesis?
What is the alternative hypothesis?
What is the test statistic used?
What is the critical value of the test statistic?
What is...
Another researcher was interested in examining academic
performance among teenage students. However, based on her
literature review, she expected that ethnicity, parental support,
and stress level would predict academic performance. Further, her
study was based in New York.
Therefore, she collected data from one hundred and fifty (150)
students from a school in New York. She hypothesized that parental
support would positively predict academic performance, while stress
would negatively predict academic performance. She also
hypothesized that ethnicity would predict academic...
3) Suppose you are an educational researcher who wishes to examine the effect of a school district's class size on its student achievement. Specifically, you are interested in whether in the U.S., on average, school districts with smaller class sizes perform differently on test scores than school districts with larger class sizes. To test this, you have conducted two surveys. The first survey randomly sampled 238 school districts with small class sizes. This survey found a sample average test score...
Please help this is my last problem!
A researcher wants to study the relationship between salary and gender. She randomly selects 400 individuals and determines their salary and gender. Can the researcher conclude that salary and gender are dependent? Male Female Total Below $25,000 50 38 88 $25,000 $50,000 38 31 69 $50,000-$75,000 50 85 135 Above $75,000 62 46 108 200 200 400 Income Total Copy Data Step 5 of 8: Find the degrees of freedom associated with the...
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