Homework Help is Here – Start Your Trial Now!
Math
Statistics
1. A team of scientists wants to test a new medication to see if it has either a positive or negative effect on intelligence, or no effect at all. A sample of 25 participants who have taken the medication has a mean of 150 with a standard deviation of 20. a. Calculate the degrees of freedom b. What is the t-value? c. What is your confidence level?

1. A team of scientists wants to test a new medication to see if it has either a positive or negative effect on intelligence, or no effect at all. A sample of 25 participants who have taken the medication has a mean of 150 with a standard deviation of 20. a. Calculate the degrees of freedom b. What is the t-value? c. What is your confidence level?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
See similar textbooks
icon
Related questions
Question
1. A team of scientists wants to test a new medication to see if it has either a positive or negative effect on intelligence, or no effect at all. A sample of 25 participants who have taken the medication has a mean of 150 with a standard deviation of 20. a. Calculate the degrees of freedom b. What is the t-value? c. What is your confidence level? d. What is the confidence interval? e. Plot in a normal distribution graph your answers, Cnitical Values 1-tailed 0.1 0.05 0.025 0.01 0.005 2-ailed 0.2 0.1 9.05 0.02 0.01 3.0777 6.318 12.7062 31.8205 63.6567 1.8856 2.9200 4.3027 6.9646 9.9248 1.6377 2.3534 3.1824 4.5407 5.3409 1.5332 2.1318 2.7764 3.7469 4.6041 1.4759 2.0150 2.5706 3.3449 4.0321 1.4398 1.9432 24469 3.1427 3.7074 1.4149 1.4945 2.3645 2.90 1.3948 1.8595 2.3010 3.3554 1.3830 1.8331 2.2622 2.8214 3.2498 10 1.3722 1.8125 22281 2.7638 3.1693 11 1.3624 1.7959 2.2010 2.7181 3.1058 12 1.3562 1.7823 21788 2.6810 3.0545 13 1.3502 1.7709 2.1604 2.6503 3.0123 14 1.3450 1.7613 2.1448 26245 2.9768 15 1.3406 1.7531 2.1314 2.6025 2.9467 16 1.348 1.7459 2.1119 2.5835 2.1208 17 1.3334 1.736 2.1014 2.5669 2.4982 18 1.3304 1.7341 2.1009 2.5524 2.8784 19 1.3277 1.7291 2.0930 2.5395 2.8609 a (7
Transcribed Image Text:1. A team of scientists wants to test a new medication to see if it has either a positive or negative effect on intelligence, or no effect at all. A sample of 25 participants who have taken the medication has a mean of 150 with a standard deviation of 20. a. Calculate the degrees of freedom b. What is the t-value? c. What is your confidence level? d. What is the confidence interval? e. Plot in a normal distribution graph your answers, Cnitical Values 1-tailed 0.1 0.05 0.025 0.01 0.005 2-ailed 0.2 0.1 9.05 0.02 0.01 3.0777 6.318 12.7062 31.8205 63.6567 1.8856 2.9200 4.3027 6.9646 9.9248 1.6377 2.3534 3.1824 4.5407 5.3409 1.5332 2.1318 2.7764 3.7469 4.6041 1.4759 2.0150 2.5706 3.3449 4.0321 1.4398 1.9432 24469 3.1427 3.7074 1.4149 1.4945 2.3645 2.90 1.3948 1.8595 2.3010 3.3554 1.3830 1.8331 2.2622 2.8214 3.2498 10 1.3722 1.8125 22281 2.7638 3.1693 11 1.3624 1.7959 2.2010 2.7181 3.1058 12 1.3562 1.7823 21788 2.6810 3.0545 13 1.3502 1.7709 2.1604 2.6503 3.0123 14 1.3450 1.7613 2.1448 26245 2.9768 15 1.3406 1.7531 2.1314 2.6025 2.9467 16 1.348 1.7459 2.1119 2.5835 2.1208 17 1.3334 1.736 2.1014 2.5669 2.4982 18 1.3304 1.7341 2.1009 2.5524 2.8784 19 1.3277 1.7291 2.0930 2.5395 2.8609 a (7
Critical Values 1-tailed 0.1 0.05 0.025 0.01 0.005 2-ailed 0.2 0.1 0.05 0.02 0.01 3.0777 6.31 12.7062 31.8205 63.6667 1.8856 2.9200 4.3027 6.9646 9.9248 1.6377 2.3534 3.1824 4.5407 6.8409 1.6332 2.1318 2.7764 3.7469 4.6041 1.4759 2.0150 2.5706 3.3649 4.0321 1.4398 1.9432 2.4469 3.1427 3.7074 1.4149 1.4946 2.3645 2.9980 3.4995 1.3948 1.8595 2.3010 2.8945 3.3554 1.3830 1.8331 22622 2.8214 3.2498 10 1.3722 1.8125 22281 2.7638 3.1693 11 1.3624 1.7959 2.2010 2.7181 3.1054 12 1.3562 1.7823 2.1788 2.8810 3.0645 13 1.3502 1.7709 2.1604 2.6600 3.0123 14 1.3450 1.7613 2.1448 26245 2.9764 15 1.3406 1.7631 2.1314 2.6025 2.9467 16 1.3348 1.7459 2.119 2.5835 2.9208 17 1.3334 1.736 2.1014 2.5669 2.8982 18 1.3304 1.7341 2.1009 2.5524 2.8784 19 1.3277 1.7291 2.0930 2.5395 2.3609 20 1.3253 1.7247 2.0860 2.5280 2.3453 21 1.3232 1.7207 2.0796 2.5176 2.8314 22 1.3212 1.7171 2.0739 2.5083 2.8188 23 1.3195 1.7139 2.0687 2.4919 2.4073 24 1.3178 1.7109 2.0639 2.4922 2.7969 25 1.3163 1.7081 2.0595 2.4851 2.7874 26 1.3150 1.7054 2.0655 2.4786 2.7787 27 1.3137 1.7033 2.0518 2.4727 2.7707
Transcribed Image Text:Critical Values 1-tailed 0.1 0.05 0.025 0.01 0.005 2-ailed 0.2 0.1 0.05 0.02 0.01 3.0777 6.31 12.7062 31.8205 63.6667 1.8856 2.9200 4.3027 6.9646 9.9248 1.6377 2.3534 3.1824 4.5407 6.8409 1.6332 2.1318 2.7764 3.7469 4.6041 1.4759 2.0150 2.5706 3.3649 4.0321 1.4398 1.9432 2.4469 3.1427 3.7074 1.4149 1.4946 2.3645 2.9980 3.4995 1.3948 1.8595 2.3010 2.8945 3.3554 1.3830 1.8331 22622 2.8214 3.2498 10 1.3722 1.8125 22281 2.7638 3.1693 11 1.3624 1.7959 2.2010 2.7181 3.1054 12 1.3562 1.7823 2.1788 2.8810 3.0645 13 1.3502 1.7709 2.1604 2.6600 3.0123 14 1.3450 1.7613 2.1448 26245 2.9764 15 1.3406 1.7631 2.1314 2.6025 2.9467 16 1.3348 1.7459 2.119 2.5835 2.9208 17 1.3334 1.736 2.1014 2.5669 2.8982 18 1.3304 1.7341 2.1009 2.5524 2.8784 19 1.3277 1.7291 2.0930 2.5395 2.3609 20 1.3253 1.7247 2.0860 2.5280 2.3453 21 1.3232 1.7207 2.0796 2.5176 2.8314 22 1.3212 1.7171 2.0739 2.5083 2.8188 23 1.3195 1.7139 2.0687 2.4919 2.4073 24 1.3178 1.7109 2.0639 2.4922 2.7969 25 1.3163 1.7081 2.0595 2.4851 2.7874 26 1.3150 1.7054 2.0655 2.4786 2.7787 27 1.3137 1.7033 2.0518 2.4727 2.7707
Expert Solution
steps

Step by step

Solved in 4 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
SEE MORE TEXTBOOKS