number 12 QUESTION 11 The student\'s T-Distribution ( for a quantitative variabl

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number 12

QUESTION 11 The student's T-Distribution ( for a quantitative variable) is used when? 2 points Save Answer A. the population's standard deviation is unknown B. the sample statistic (mean) is unknown C. the sample standard deviation is unknown D. the margin of error is greater than the confidence interval QUESTION 12 2 points Save Answer The process of testing a null hypothesis includes determining the alternative hypothesis, finding a test statistic and A. Find the mean value of the population B. Comparing the test statistic's p-value against the level of significance C. Comparing the ratio of the standard error with the standard deviation D. Using the z-sore for finding a probability 2 points Save Answer Scores on a statics final exam in a large class were normally distributed with a mean of 75% and a standard deviation of 8%, what proportion of the scores were above 9%? QUESTION 13 O Type here to search FT 7 6 5 4 3 2

Explanation / Answer

here to test the hypothesis either we compare test statistic with critical value or test statistic' p value with level of significance

therefore option B is correct

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