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Your statistics teacher has repeatedly told class that more you study, the better you will do on tests. You make decision to verify this statement. You arbitarily choose 12 classmates and ask them how long they studied for last test and what grade they made. Here are the data:
Student Hours studied Grade1 17 912 12 733 8 704 14 865 10 716 3 627 20 878 11 769 7 6810 16 8411 9 6612 15 83
1. Use Hypothesis testing to compute te correlation between these two variables and these it for significance. Test at .01 level of significance.
a. Step 1: State Hypothesisb. Step 2: Set Criteriac. Step 3: Calculate Sample Statistici. Use excel to compute r valued. Step 4: Make a decisioni. Did you reject null/fail to reject nullii. Define your conclusions in your own words
2. Another classmate told you that she studied 25 hours. What would you forecast her score on test?a. Write the regression equation?b. Use regression equation to answer question
Estimate a test statistic for null hypothesis H0: μ = 30 against two-sided alternative hypothesis H1 : μ ≠ 30, and by plotting this on its reference distribution.
Determine a 90% confidence interval for the mean weight of all university male first-year students.
Compare the effectiveness of three methods of teaching (IV). You plan to administer a standardized test (DV measured on an interval scale measuring knowledge acquisition) to the students in three classes with each class using a different teaching ..
Test the equality of the means of three populations.
how many chocolate chip cookies will he need to sample to estimate the mean to within 2, what is a 99% confidence interval for the average number of chips per cookie?
Chi-square test for independent attributes - Are the opinions on the tax cut proposal independent of party affiliation? Use a = 0.01
Develop four probability questions using the table that you as an instructor of statistics might ask a class of students for a test in probability.
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F (based on data from the University of Maryland researchers).
The city of Laguna Beach operates two public parking lots. The one on Ocean drive can accommodate upto 125 cars and the one on Rio Rancho can accommodate upto 130 cars.
Calculate the correlation coefficient and prediction equation.
A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime.
What information is provided by the numeral value of the Pearson correlation? What is the major distinction between the Pearson and Spear man correlations?
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