Reference no: EM1323332

Q1) Centre for Genocide Studies thinks that more than 15% of world's ethnic groups have been victims of genocide. To examine this hypothesis they have reviewed histories of a random sample of 100 of world's ethnic groups and found that 18 of them had experienced genocide. Do data support their hypothesis at.01 significance level?

i) Yes, the p-value is less than .01

ii) No, the p-value is not less than .01

iii) Yes, the p-value is greater than .01

iv) None of the above

Q2) What does it mean to say result is not statistically significant?

i) A null hypothesis has not been rejected

ii) The probability of the observed valued or one more extreme is greater than

iii) The evidence in support of the alternative hypothesis is insufficient

iv) All of the above

Q3)  95% confidence interval evaluate for proportion of Americans who believe Abraham Lincoln is United States' most outstanding President is 65% to 75%. If more precise estimate is requested, then confidence level

i) Increases

ii) Remains the same

iii) Decreases

iv) None of the above

Q4) Width of confidence interval evaluate of mean (µ, like average credit card debt for American college students) narrows when:

i) Level of confidence increases

ii) Sample size increases

iii) Sample size decreases

iv) All of the above