Question

In: Statistics and Probability

include null and alternate hypothesis, a p-value, and a conclusion PRIVATE about the null hypothesis Applicants...

include null and alternate hypothesis, a p-value, and a conclusion PRIVATE about the null hypothesis

Applicants for a job in a foreign country are given a language proficiency test. The following data shows the number of years they have studied the language and their grade on the test.

No. of years, x344536237 Test grade, y616875827390587293

(1.)Plot the scatter diagram for the data on the axes below:

(2.)Find the coefficient of correlation ( r )

(3.)Find the Regression line equation for this data.

(4.)Plot the regression line on the same set of axes as the scatter diagram

Solutions

Expert Solution

Solution:

1) Scatter plot is:

2) coefficient of correlation is:

3) Regression equation is:

4) plot of regression line is:


Related Solutions

Include null and alternate hypothesis, a p-value, and a conclusion PRIVATE about the null hypothesis A...
Include null and alternate hypothesis, a p-value, and a conclusion PRIVATE about the null hypothesis A student claimed that the average grade in the night sections of Statistics was higher than the day sections. She used a sample of 35 students from night sections and found they had a mean of 78 with a standard deviation of 8. A sample of 32 day students had a mean of 75 with a standard deviation of 6. Is the student's hypothesis supported?...
Include null and alternate hypothesis, a p-value, and a conclusion PRIVATE about the null hypothesis Nine...
Include null and alternate hypothesis, a p-value, and a conclusion PRIVATE about the null hypothesis Nine students took the SAT. After taking it, they then took a test preparation course and retook the SAT. Can you conclude that the course changes performance on the SAT? (use α = .1) Before 720 860 850 880 860 710 850 1200 950 After 740 860 840 920 890 720 840 1240 970
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses both the claim and the significance level alpha. Use the P-value method. A sample of 17 jellybeans with a mean weight of 0.8295 g was taken. Assume that σ is known to be 0.0565 g. Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean weight of all jellybeans is equal to 0.8550 g...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Various temperature measurements are recorded at different times for a particular city. The mean of 20°C is obtained for 60 temperatures on 60 different days. Assuming that test the claim that the population mean is 22°C . Use a 0.05 significance level. Testing Hypothesis Z-Table
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. a) A poll of 1068 adult Americans reveals that 48% of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, test the claim that at least half of all voters prefer the Democrat. b) In a sample of 167 children selected randomly from one town, it is found that 37 of...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Use the given data set of x and y values to answer the following questions. x-values 1 1 1 2 2 2 3 3 3 9 y-values 8 9 10 8 9 10 8 9 10 2 (a) Use StatCrunch to find the regression equation, ˆy = b0 + b1x and the sample correlation...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Listed below are ages of actresses and actors from a country at the times that they won a certain award. The data are paired according to the years that they won. Use a 0.01 significance level to test the belief that best actresses are younger than best actors. Does the result suggest a problem...
please include test statistic , p value , conclusion of null hypothesis, reject or fail to...
please include test statistic , p value , conclusion of null hypothesis, reject or fail to reject , critical values The table below summarizes data from a survey of a sample of women. Using a 0.05 significance​ level, and assuming that the sample sizes of 800 men and 300 women are​ predetermined, test the claim that the proportions of​ agree/disagree responses are the same for subjects interviewed by men and the subjects interviewed by women. Does it appear that the...
Test the following claim. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic, P-value, conclusion about the...
Test the following claim. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic, P-value, conclusion about the null​ hypothesis, and final conclusion that addresses the original claim. A simple random sample of 60 screws supplied by a certain manufacturer is​ obtained, and the length of each screw is measured. The sample mean is found to be 0.622 in. Assume that the standard deviation of all such lengths is 0.016 ​in, and use a 0.01 significance level to test the claim that...
Isabella continues her hypothesis test, by finding the p-value to make a conclusion about the null...
Isabella continues her hypothesis test, by finding the p-value to make a conclusion about the null hypothesis. H0:μ=48.4; Ha:μ≠48.4, which is a two-tailed test. α=0.1. z0=1.95 Which is the correct conclusion of Isabella's one-mean hypothesis test at the 10% significance level? z 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 1.8 0.9641 0.9649 0.9656 0.9664 0.9671 0.9678 0.9686 0.9693 0.9699 0.9706 1.9 0.9713 0.9719 0.9726 0.9732 0.9738 0.9744 0.9750 0.9756 0.9761 0.9767 2.0 0.9772 0.9778 0.9783 0.9788 0.9793...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT