Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A popular, nationwide standardized test taken by high-school juniors and seniors may or may not measure academic potential, but we can nonetheless examine the relationship between scores on this test and performance in college.
We have chosen a random sample of fifteen students just finishing their first year of college, and for each student we've recorded her score on this standardized test (from 400 to 1600 ) and her grade point average (from 0 to 4) for her first year in college. The data are shown below, with denoting the score on the standardized test and denoting the first-year college grade point average. A scatter plot of the data is shown in Figure 1. Also given are the products of the standardized test scores and grade point averages for each of the fifteen students. (These products, written in the column labelled "," may aid in calculations.)
Standardized Test score x Grade Point average y Xy
1010 2.42 2444.2
1250 3.30 4125
1070 3.10 3317
1100 2.16 2376
890 2.75 2447.5
1350 3.48 4698
780 2.40 1872
1500 3.03 4545
1500 3.45 5175
990 3.15 3118.5
1290 2.98 3844.2
940 2.16 2030.4
1190 2.83 3367.7
1410 3.27 4610.7
860 2.23 1917.8
What is the value of the slope of the least squares regression line for these data? Round your answer to at least four decimal places.
Which of the following Venn diagrams has shaded the event that the contractor wins exactly one of the contracts and evaluate the mean time to complete the entire homework assignment
Suppose the download times for a commercial tax preparation site are normally distributed with a mean download time of 2.0 seconds and a standard deviation of 0.5 second.
Generate a 95% confidence interval for the true mean total cholesterol levels in children.
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
Critically discuss the main differences between descriptive and inferential statistics? Provide an example of either type of statistics either from a recent study you heard about or a made up study you'd be interested in learning about.
Assuming we can verify that the data set is approximately normally distributed, what percentage of times will the server be down less than 24 minutes?
Report the t-value, whether you accept or reject Ho, and whether the difference was significant in a brief sentence.
Describe the difference between sample and a sampling distribution. Your reply must be in complete sentences and you may use sketches to help you.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Assume the population proportion is 0.17 and a simple random sample of 850 households will be selected from the population. What is the probability that the sample proportion will be within ±0.02 of the population proportion?
Using the p-value approach, test the hypotheses at the 1% level of significance.
In looking at your business, when and why would you want to use a one-sample mean test (either z or t) or a two-sample t-test? Create a null and alternate hypothesis for one of these issues. How would you use the results?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd