Asked by Audrey
The distribution of cholesterol levels of the residents of a state closely follows the normal curve. Investigators want to test whether the mean cholesterol level of the residents is 200 mg/dL or lower. A simple random sample of 12 residents has a mean cholesterol level of 185 mg/dL, with an SD of 20 mg/dL (computed as the ordinary SD of a list of 12 numbers, with 12 in the denominator).
Let m be the mean cholesterol level of the residents of the state, measured in mg/dL. Perform a t test of the hypotheses
Null: m = 200 Alternative: m < 200
QUESTION 1.
You are using data from a simple random sample to test the given hypotheses. Which of the following collections of observations is further required to justify the use of a t distribution to compute the P-value?
The distribution of the cholesterol levels of the residents of the state is close to normal.
The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean.
The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean and an unknown SD.
QUESTION 2
The t distribution that should be used has ______ degrees of freedom.
QUESTION 3
The value of the t statistic is closest to
-2 -2.1 -2.2 -2.3 -2.4 -2.5 -2.6 -2.7 -2.8 -2.9 -3
QUESTION 4
The P-value of the test is closest to
0.5% 1% 1.5% 2% 2.5% 3%
QUESTION 5
The conclusion of the test is to
reject the null hypothesis
not reject the null hypothesis
Thank you!!!!!
Let m be the mean cholesterol level of the residents of the state, measured in mg/dL. Perform a t test of the hypotheses
Null: m = 200 Alternative: m < 200
QUESTION 1.
You are using data from a simple random sample to test the given hypotheses. Which of the following collections of observations is further required to justify the use of a t distribution to compute the P-value?
The distribution of the cholesterol levels of the residents of the state is close to normal.
The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean.
The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean and an unknown SD.
QUESTION 2
The t distribution that should be used has ______ degrees of freedom.
QUESTION 3
The value of the t statistic is closest to
-2 -2.1 -2.2 -2.3 -2.4 -2.5 -2.6 -2.7 -2.8 -2.9 -3
QUESTION 4
The P-value of the test is closest to
0.5% 1% 1.5% 2% 2.5% 3%
QUESTION 5
The conclusion of the test is to
reject the null hypothesis
not reject the null hypothesis
Thank you!!!!!
Answers
Answered by
Peter
QUESTION 1.
The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean and an unknown SD.
QUESTION 4
2%
QUESTION 5
reject the null hypothesis
QUESTION 2
2
QUESTION 3
-2.3
The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean and an unknown SD.
QUESTION 4
2%
QUESTION 5
reject the null hypothesis
QUESTION 2
2
QUESTION 3
-2.3
Answered by
Anon
Some answers are wrong.
Answered by
CC
this test is easy listen the videos and do the exercises of those videos and it's easy. If you have any doubt just ask.
Answered by
Charlotte
What are the wrong answer?
Answered by
Din123
The questions 2, 3 and 4 are wrong
Answered by
OK
Need answer to P 10
Answered by
Marcov
Do not try the answers they tell you. We have many stupids here with psycho problems. They tell you randomly the answers to try for them!
Answered by
stat001
The P-value of the test is closest to
ans is 1.5%
ans is 1.5%
Answered by
stat001
question number 10 ans is
"one-sample z = (2.95 - 2.9)/0.055 = 0.909; P large; conclude chance variation"
"one-sample z = (2.95 - 2.9)/0.055 = 0.909; P large; conclude chance variation"
Answered by
stat001
PROBLEM 7 ans is 14.5
Answered by
stat001
PROBLEM 9 ans is 3
Answered by
stat001
PROBLEM 8 ans is 1.8
Answered by
stat002
Does anybody know the P4 and P5 answers?
P4: -2.6 -2.1 and -2.3 are wrong
P5: 1%, 2.5%, and 0.5% are wrong
P4: -2.6 -2.1 and -2.3 are wrong
P5: 1%, 2.5%, and 0.5% are wrong
Answered by
stat001
can anyone let me know the answer to
PROBLEM 1 -
A statistical test is performed, and its P-value turns out to be about 3%. Which of the following must be true? Pick all that are correct.
PROBLEM 3 -
The t distribution that should be used has ______ degrees of freedom.
PROBLEM 4 -
The value of the t statistic is closest to
Note- me and my friends found the below ones are to be wrong ans to PROBLEM 4
-2.6
-2.8
-2.3
-2.9
-2.1
-2.7
so ans could be one among these
-2
-2.2
-2.4
-2.5
-3
PROBLEM 1 -
A statistical test is performed, and its P-value turns out to be about 3%. Which of the following must be true? Pick all that are correct.
PROBLEM 3 -
The t distribution that should be used has ______ degrees of freedom.
PROBLEM 4 -
The value of the t statistic is closest to
Note- me and my friends found the below ones are to be wrong ans to PROBLEM 4
-2.6
-2.8
-2.3
-2.9
-2.1
-2.7
so ans could be one among these
-2
-2.2
-2.4
-2.5
-3
Answered by
Helen
P3 is 11
Answered by
stat001
@helen- thank you..
@stat002- answer already posted as
"The P-value of the test is closest to
ans is 1.5% "
@stat002- answer already posted as
"The P-value of the test is closest to
ans is 1.5% "
Answered by
stat001
PROBLEM 4's ans is -2.5
Answered by
stat001
have started another question forum with answers to make life easier......
jiskha com/display.cgi?id=1375826423
put a . b/w 1st two words.. site is not allowing me to post weblinks
jiskha com/display.cgi?id=1375826423
put a . b/w 1st two words.. site is not allowing me to post weblinks
Answered by
Helen
Thank you stat001
The link you gave us is not directing on a specific question.
The link you gave us is not directing on a specific question.
Answered by
Din123
PROBLEM 1 - "E" and "F"
Answered by
stat001
@Helen - i can see that,not sure how the page was deleted,see below incl ur ans
PROBLEM 1
ans: E & F
PROBLEM 2
ans: C - "The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean and an unknown SD"
PROBLEM 3
ans:11
PROBLEM 4
ans:-2.5
PROBLEM 5
ans:1.5%
PROBLEM 6
ans:reject the null hypothesis
PROBLEM 7
ans:14.5
PROBLEM 8
ans:1.8
PROBLEM 9
ans:3
PROBLEM 10
ans: B - "one-sample z = (2.95 - 2.9)/0.055 = 0.909; P large; conclude chance variation"
PROBLEM 1
ans: E & F
PROBLEM 2
ans: C - "The distribution of the cholesterol levels of the residents of the state is close to normal, with an unknown mean and an unknown SD"
PROBLEM 3
ans:11
PROBLEM 4
ans:-2.5
PROBLEM 5
ans:1.5%
PROBLEM 6
ans:reject the null hypothesis
PROBLEM 7
ans:14.5
PROBLEM 8
ans:1.8
PROBLEM 9
ans:3
PROBLEM 10
ans: B - "one-sample z = (2.95 - 2.9)/0.055 = 0.909; P large; conclude chance variation"
Answered by
stat001
@Din123 Thank you
Answered by
Anonymous
Why bother doing this class if you're just asking people to give you the answers? It's a free online class with no grades.
Answered by
Anonymous
Honor Code
This can be found at edx org/honor and you are required to follow it. The course staff would like to express their appreciation of all the students who follow the honor code scrupulously.
The honor code is not just decoration or boilerplate; it sets out community standards that make the course grades and certificate meaningful, and indeed make the entire endeavor of the course worthwhile. Publishing course materials without proper attribution is theft of intellectual property; asking others to do your work for you is cheating. Please do not diminish the honest efforts of your fellow students by violating the honor code. Don’t steal or cheat.
This can be found at edx org/honor and you are required to follow it. The course staff would like to express their appreciation of all the students who follow the honor code scrupulously.
The honor code is not just decoration or boilerplate; it sets out community standards that make the course grades and certificate meaningful, and indeed make the entire endeavor of the course worthwhile. Publishing course materials without proper attribution is theft of intellectual property; asking others to do your work for you is cheating. Please do not diminish the honest efforts of your fellow students by violating the honor code. Don’t steal or cheat.
Answered by
Thanks
Stat001 @Din123, well done
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