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प्रश्न
Choose the correct alternative:
A ______ is a statement or an assertion about the population parameter
पर्याय
hypothesis
statistic
sample
census
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उत्तर
hypothesis
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संबंधित प्रश्न
What is null hypothesis? Give an example
What is a type I error?
What is single tailed test
The average score on a nationally administered aptitude test was 76 and the corresponding standard deviation was 8. In order to evaluate a state’s education system, the scores of 100 of the state’s students were randomly selected. These students had an average score of 72. Test at a significance level of 0.05 if there is a significant difference between the state scores and the national scores
The mean breaking strength of cables supplied by a manufacturer is 1,800 with a standard deviation of 100. By a new technique in the manufacturing process it is claimed that the breaking strength of the cables has increased. In order to test this claim a sample of 50 cables is tested. It is found that the mean breaking strength is 1,850. Can you support the claim at 0.01 level of significance?
Choose the correct alternative:
Type I error is
Choose the correct alternative:
Type II error is
Choose the correct alternative:
The standard error of sample mean is
Explain in detail the test of significance of a single mean
The mean I.Q of a sample of 1600 children was 99. Is it likely that this was a random sample from a population with a mean I.Q 100 and standard deviation of 15? (Test at 5% level of significance)
