When a researcher reports that a result is statistically significant, what does this mean? A. The...
When a researcher reports that a result is statistically significant, what does this mean?
| A. |
The result does not contain a Type I or Type II error. |
|
| B. |
The obtained result likely was not the result of chance. |
|
| C. |
The result is important and clinically meaningful. |
|
| D. |
The result did not fall within the critical region on the sampling distribution. |
Homework Answers
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When a researcher reports that a result is statistically
significant, what does this mean?
A.
The...
1. Which of the following demonstrates a Type I Error? A. A researcher obtains a significant...
1. Which of the following demonstrates a Type I Error? A. A researcher obtains a significant result and rejects the null hypothesis when the result is actually due to random chance and sampling error. B. A researcher obtains a significant result and fails to reject the null hypothesis when the result is actually due to random chance and sampling error. C. A researcher obtains a nonsignificant result and rejects the null hypothesis when the result is actually due to a...
a) A result is statistically significant if it is unlikely to occur by random chance alone. true or...
a) A result is statistically
significant if it is unlikely to occur by random chance
alone.
true or false
b) If a result is NOT statistically significant, that
means the chance model must be true.
true or false
c) there are always two possible explanations for the
statistics obtained from a sample. Select the two possible
explanations below.
Generalizability
Something is going on
Random chance
Sampling bias
d) what does the researcher's question, or what the
researcher thinks is true, determine?...
1. If z (obtained) is outside of the critical region then the researcher would typically? a....
1. If z (obtained) is outside of the critical region then the researcher would typically? a. Reject the null hypothesis b. Not reject the null hypothesis c. Modify the weight of the outliers d.Decrease the sample size 2.Assuming that the null hypothesis states that the defendant is innocent, if the defendant is found guilty when actually innocent would exemplify a a. Standard error b. Standard deviation c. Type I error d. Type II error 3.Z (obtained) is the _____. a....
QUESTION 57 An experimental result that is statistically significant is O a influenced by sampling error...
QUESTION 57 An experimental result that is statistically significant is O a influenced by sampling error O b. unlikely to occur by chance alone O c. scientifically significant or important O d. likely to occur by chance alone O e. the result of an experiment with only one variable QUESTION 58 How do hydrophobic molecules react with water? O a. They are repelled by water. b. They are moted with water. O c. They are polarized by water Od. They...
Help me please One method of research is to study a subset (sample) of the population...
Help me please
One method of research is to study a subset (sample) of the population and try to make inferences about the population. O True False D Question 13 1 pts The critical region(s) for the above hypothesis (question #12) would be contained in two tails in the distribution. O True O False Question 14 1 pts The z-test is used if the researcher knows pand o in a normally distributed population. O True O False Question 15 1...
The Speedy Oil Change Company advertises that the average mean time it takes to change a...
The Speedy Oil Change Company advertises that the average mean time it takes to change a customer's oil is 10 minutes. After receiving complaints from dissatisfied customers, the management at Speedy Oil Change headquarters hired a researcher to investigate the complaints to determine if the oil change took significantly longer than 10- 8minutes. The researcher randomly investigates 20 oil changing jobs and computes thesample mean time to change a customer’s oil is 11.3 minutes with a sample standard deviation of...
please answer all questions 12-15 Question 12 2 pts The phrase statistically significant means that the...
please answer all questions 12-15
Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded...
To test Ho: p=0.35 versus Hy:p>0.35, a simple random sample of n = 200 individuals is obtained and x = 69 successes are observed. (a) What does it mean to make a Type Il error for this test? (b) If the researcher decides to test this hypothesis at the a =
To test Ho: p=0.35 versus Hy:p>0.35, a simple random sample of n = 200 individuals is obtained and x = 69 successes are observed. (a) What does it mean to make a Type Il error for this test? (b) If the researcher decides to test this hypothesis at the a = 0.01 level of significance, compute the probability of making a Type II error, B, if the true population proportion is 0.38. What is the power of the test? (c)...
E is yes or no option!!! Thank you Suppose you are a researcher in a hospital....
E is yes or no option!!! Thank you
Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 10 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: Hours 3 2.6 2.4 2.8 2.4 2 2 2.4 2.2 2.9 a) What is a point estimate for the population mean length of time. (Round answer to 4 decimal places) b)What must...
SOLVE ONLY PART E has mean that has changecl tom 40 Assume that, when 1. There is a concern a voltage generator tested, the output χ will have mean μ with standard deviation σ2) HoY 40 vs. Ha:μ#40 a...
SOLVE ONLY PART E
has mean that has changecl tom 40 Assume that, when 1. There is a concern a voltage generator tested, the output χ will have mean μ with standard deviation σ2) HoY 40 vs. Ha:μ#40 a) (3pts) What kinds of values of 3 would lead to the rejection of the null hypothesis? In other words, what is the correct form of the rejection region (RR) ? SELECT A,B,C,D,E, or F: Answer A) Significantly larger than 40 B)...
a) A result is statistically
significant if it is unlikely to occur by random chance
alone.
true or false
b) If a result is NOT statistically significant, that
means the chance model must be true.
true or false
c) there are always two possible explanations for the
statistics obtained from a sample. Select the two possible
explanations below.
Generalizability
Something is going on
Random chance
Sampling bias
d) what does the researcher's question, or what the
researcher thinks is true, determine?...
QUESTION 57 An experimental result that is statistically significant is O a influenced by sampling error O b. unlikely to occur by chance alone O c. scientifically significant or important O d. likely to occur by chance alone O e. the result of an experiment with only one variable QUESTION 58 How do hydrophobic molecules react with water? O a. They are repelled by water. b. They are moted with water. O c. They are polarized by water Od. They...
Help me please
One method of research is to study a subset (sample) of the population and try to make inferences about the population. O True False D Question 13 1 pts The critical region(s) for the above hypothesis (question #12) would be contained in two tails in the distribution. O True O False Question 14 1 pts The z-test is used if the researcher knows pand o in a normally distributed population. O True O False Question 15 1...
please answer all questions 12-15
Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded...
E is yes or no option!!! Thank you
Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 10 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: Hours 3 2.6 2.4 2.8 2.4 2 2 2.4 2.2 2.9 a) What is a point estimate for the population mean length of time. (Round answer to 4 decimal places) b)What must...
SOLVE ONLY PART E
has mean that has changecl tom 40 Assume that, when 1. There is a concern a voltage generator tested, the output χ will have mean μ with standard deviation σ2) HoY 40 vs. Ha:μ#40 a) (3pts) What kinds of values of 3 would lead to the rejection of the null hypothesis? In other words, what is the correct form of the rejection region (RR) ? SELECT A,B,C,D,E, or F: Answer A) Significantly larger than 40 B)...
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