Find the word or phrase that best fills the blank. (i) If we have a large sample

Question

Find the word or phrase that best fills the blank. (i) If we have a large sample then _____ is close to normally distributed. (a) the population (b) the sample (c) the sample mean (d) the population mean (ii) If we fail to reject H_0, then _____. (a) H_0 is true (b) H_1 is true (c) we may have made a Type I error (d) we may have made a Type II error (iii) If a sample size is too small, then a confidence interval will probably _____. (a) be wrong (b) be very wide (c) be very narrow (iv) The more expensive a type I error is, the _____ we should make the level of significance. (a) bigger (b) smaller (c) cheaper (v) In hypothesis testing, if the sample size is small there will be _____. (a) a high probability of a type I error (b) a high probability of a type II error (c) a small p-value (d) high probabilities of both type I and type II error (vi) To make a confidence interval narrower we can _____. (a) raise the confidence level (b) lower the confidence level (c) push hard at both ends (d) decrease the sample size (vii) The best time to consult a statistician is _____ (a) after the data has been collected (b) before the data is collected (c) when you need sleep (d) Thursdays

Explanation / Answer

i) Option C

ii) Option D

iii) Option B

iv) Option B

v) Option A

vi) Option B

vii) Option A

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