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? assume the population has...

construct a 90% confidence interval for the population mean, ? assume the population has a normal distribution. a sample of 15 randomly selected students has a grade point average of 2.86 with a standard deviation of 0.78. a.(2.37, 3.56) b. (2.28, 3.66) c. (2.41, 3.42) d. (2.51, 3.21)

you are going to draw three cards from a standard deck without replacement. the first card drawn is the jack of hearts. the second card drawn is a heart. what is the probability that the third card drawn is a diamond? a. 0.19 b. 0.26 c. 0.29 d. 0.31 e. none

twenty students took a statistics exam. the highest grade was 96% and the lowest was 54%. suppose the hugest grade was changed to 99%. which of the following is true? a. the mean would not be affected b. the mode would increase by 3% c. the median wouldn't be affected d. the variance would decrease by 1.5% e. all of the above are false

you are going to draw three cards from a standard deck without replacement. the first card drawn is the jack of hearts. the second card drawn is a heart. what is the probability that the third card drawn is a diamond? a. 0.19 b. 0.26 c. 0.29 d. 0.31 e. none

twenty students took a statistics exam. the highest grade was 96% and the lowest was 54%. suppose the hugest grade was changed to 99%. which of the following is true? a. the mean would not be affected b. the mode would increase by 3% c. the median wouldn't be affected d. the variance would decrease by 1.5% e. all of the above are false

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