What is a significance level? a. A pre-set level of probability that the results are correct....
What is a significance level?
a. A pre-set level of probability that the results are correct.
b. The level at which statistics finally become meaningful.
c. A pre-set level of probability at which it will be accepted that results are due to chance (or not).
d. The impact that reporting statistics incorrectly could have.
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What is a significance level? a. A pre-set level of probability that the results are correct....
Choose the correct definition of significance level from the list below. A significance level is Option...
Choose the correct definition of significance level from the
list below.
A significance level is
Option 1 and 5 are WRONG
Choose the correct definition of significance level from the list below A significance level is the probability of failing to reject the null hypothesis when the alternative hypothesis is true. the minimum acceptable chance of making a type I error. O the probability that an event occurred as a result of a causative factor rather than by chance. the...
A researcher selects an alpha level of 0.15 for a study. What does this indicate about...
A researcher selects an alpha level of 0.15 for a study. What does this indicate about the statistical analysis of the study? the researcher is willing to accept a 15% chance that the null hypothesis will be rejected incorrectly the study results are likely to reveal a high level of clinical significance of the alternative hypthesis there is a high probability of making a type one error the researcher is willing to accept an 85% chance that the null hypothesis...
1. a) For a test at a fixed significance level, and with given null and alternative...
1. a) For a test at a fixed significance level, and with given null and alternative hypotheses, what will happen to the power as the sample size increases? b) For a test of a given null hypothesis against a given alternative hypothesis, and with a given sample size, describe what would happen to the power of the test if the significance level was changed from 5% to 1%. c) A test of a given null hypothesis against a given alternative...
If a hypothesis is tested at the a = 0.05 level of significance, what is the...
If a hypothesis is tested at the a = 0.05 level of significance, what is the probability of making a type l error? Choose the correct answer below. A. The probability of making a type I error is 0.05 B. The probability of making a type I error is 0.95 O C. The probability of making a typeI error is 0.5 D. There is insufficient information to determine the probability of a type l error
For each problem, select the correct response. (a) What is the P-value of a test of...
For each problem, select the correct response. (a) What is the P-value of a test of the null hypothesis? A. The probability the null hypothesis is false B. The probability, assuming the null hypothesis is false, that the test statistic will take a value at least as extreme as that actually observed C. The probability the null hypothesis is true D. The probability, assuming the null hypothesis is true, that the test statistic will take a value at least as...
a p-value represents: a) none of the given answers are true b) the probability given the...
a p-value represents: a) none of the given answers are true b) the probability given the null hypothesis is true, that the results could have been obtained barring the involvement of chance c) the probability, given the null hypothesis is true, that the results could have been obtained purely on the basis of chance alone d) the probability, given the alternative hypothesis is true, the results could have been obtained purely on the basis of chance alone e) the probability,...
A P-value of 0.12 is calculated on a hypothesis test with a significance level set at...
A P-value of 0.12 is calculated on a hypothesis test with a significance level set at 0.01. Which of the following is the correct conclusion for the test? a. Claim the null hypothesis is true b. Fail to reject the null hypothesis c. Reject the null hypothesis d. Claim the alternative hypothesis is true Which of the following are not requirements for using the t-distribution for a hypothesis test concerning μ? (More than one answer may be correct.) a. Sample...
Perform a hypothesis test for the following sample. The significance level alpha is 5%. Sample: 7.9,8.3,8.4, 9.6,7.7, 8...
Perform a hypothesis test for the following sample. The significance level alpha is 5%. Sample: 7.9,8.3,8.4, 9.6,7.7, 8.1, 6.8,7.5,8.6,8,7.8,7.4,8.4,8.9,8.5,9.4,6.9,7.7. Test if mean 8.7. Assume normality of the data. 1 Formulate the hypothesis by entering the corresponding signs:"<" ">", "-" or "メ" and numbers. Hint: in your answers use "<>" instead of " " HO: mean H1:mean 2 p-value (rounded to three decimal places) 3 Conclusions, based on the results, which of the following options is correct: A Reject H0 and...
a)Give an example of a data set that could have physical significance, but not statistical significance. b)What are thre...
a)Give an example of a data set that could have physical significance, but not statistical significance. b)What are three alternatives to null hypothesis testing?
Which statement best describes the significance level of a hypothesis test? The probability of obtaining a...
Which statement best describes the significance level of a hypothesis test? The probability of obtaining a sample under the assumption that the null hypothesis is true that is more unusual than the observed sample b. The probability of making a Type 1 error The probability of making a Type Il error. d. The probability of correctly rejecting the null hypothesis.
Choose the correct definition of significance level from the
list below.
A significance level is
Option 1 and 5 are WRONG
Choose the correct definition of significance level from the list below A significance level is the probability of failing to reject the null hypothesis when the alternative hypothesis is true. the minimum acceptable chance of making a type I error. O the probability that an event occurred as a result of a causative factor rather than by chance. the...
If a hypothesis is tested at the a = 0.05 level of significance, what is the probability of making a type l error? Choose the correct answer below. A. The probability of making a type I error is 0.05 B. The probability of making a type I error is 0.95 O C. The probability of making a typeI error is 0.5 D. There is insufficient information to determine the probability of a type l error
Perform a hypothesis test for the following sample. The significance level alpha is 5%. Sample: 7.9,8.3,8.4, 9.6,7.7, 8.1, 6.8,7.5,8.6,8,7.8,7.4,8.4,8.9,8.5,9.4,6.9,7.7. Test if mean 8.7. Assume normality of the data. 1 Formulate the hypothesis by entering the corresponding signs:"<" ">", "-" or "メ" and numbers. Hint: in your answers use "<>" instead of " " HO: mean H1:mean 2 p-value (rounded to three decimal places) 3 Conclusions, based on the results, which of the following options is correct: A Reject H0 and...
Which statement best describes the significance level of a hypothesis test? The probability of obtaining a sample under the assumption that the null hypothesis is true that is more unusual than the observed sample b. The probability of making a Type 1 error The probability of making a Type Il error. d. The probability of correctly rejecting the null hypothesis.
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