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1. www.simplypsychology.org › p-value-calculator-fromP-Value Calculator for Chi-Square - Simply Psychology

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   18 hours ago · The chi-square test is used to determine if there's a significant association between categorical variables. It compares observed frequencies (what you actually count) to expected frequencies (null hypothesis prediction), helping researchers assess whether differences are due to chance or a real relationship in the population. Reviewer. Author.

2. fastercapital.com › content › StatisticalStatistical Significance: Achieving Clarity: Statistical ...

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   4 days ago · Significance Level (Alpha): The significance level, often denoted as alpha (α), is the probability of rejecting the null hypothesis when it is actually true (Type I error). Commonly set at 0.05, lowering alpha requires a larger sample size to maintain the same power.

3. b28mathstutor.co.uk › hypothesis-testing-forHypothesis testing for Normal (A-level Maths) | B28 Maths Tutor

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   5 days ago · A hypothesis test of the mean of a normal distribution is a test to decide whether there is statistically significant evidence that the mean has changed from a known previous value. This test is for a population that is Normally distributed and has known variance σ 2.

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     Introduction to power in significance tests | AP Statistics | Khan Academy

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5. b28mathstutor.co.uk › hypothesis-testing-forHypothesis testing for Binomial (A-level Maths) | B28 Maths Tutor

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   5 days ago · The significance level, α, dictates how demanding the test is. If the significance level is 10%, or α = 0.1, then we’re looking to see whether the probability of the observed result (under the old probability) is less than 0.1.

6. scales.arabpsychology.com › stats › what-does-a-pWhat does a p-value less than 0.01 indicate? Can you provide ...

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   3 days ago · A p-value less than 0.01 indicates strong statistical significance in a hypothesis test. This means that there is a very low probability of obtaining the observed results by chance alone, and supports the rejection of the null hypothesis.

7. scales.arabpsychology.com › stats › how-can-i-useHow can I use the CHITEST function in Excel to calculate the ...

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   3 days ago · The CHITEST function in Excel is a statistical tool that allows users to determine the significance of differences between two sets of data. It calculates the p-value, which is a measure of the probability that the observed differences between the two sets of data occurred by chance.

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   What is the significance level of a test?

   • The significance level, α, dictates how demanding the test is. If the significance level is 10%, or α = 0.1, then we’re looking to see whether the probability of the observed result (under the old mean) is less than 0.1. If it is then the result is considered significant and we reject H 0.

   Hypothesis testing for Normal (A-level Maths) | B28 Maths Tutor

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   What is the significance level for a sample mean?

   • So for any question that mentions sample means, you should use for the standard deviation (or for the variance). The significance level, α, dictates how demanding the test is. If the significance level is 10%, or α = 0.1, then we’re looking to see whether the probability of the observed result (under the old mean) is less than 0.1.

   Hypothesis testing for Normal (A-level Maths) | B28 Maths Tutor

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   What is a 5% level of significance?

   • At a 5% level of significance, 5% of results would be in the critical region, so it may still be a genuine result under the old probability, just one at the outer edges of what’s normally observed. There are two possible approaches to the hypothesis test for Normal:

   Hypothesis testing for Normal (A-level Maths) | B28 Maths Tutor

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   What if the p-value is less than the level of significance?

   • Since the P-value is LESS than the level of significance, REJECT the null hypothesis. There IS sufficient evidence to conclude that the standard deviation has decreased at the 0.10 level of significance. 20) Test the given claim. Assume that a simple random sample is selected from a normally distributed population.

   Chapter 8: Hypothesis testing Flashcards | Quizlet

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9. quizlet.com › 787973912 › chapter-8-hypothesisChapter 8: Hypothesis testing Flashcards | Quizlet

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   3 days ago · The accompanying calculator display shows results from a test of the claim that less than 11 % of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.01 significance level to complete parts (a) through (e) below.