Basic Methods of Testing Quiz

survey of senior executives 47.3% 50%, 0.01 significance level and test statistic of z=2.98

A. 0.0028

recent years town experienced arrest rate of 25% robberies. 30 recent robberies the arrest rate is 30% significance level of 0.05

A. 0.2643

presidential election 308 out of 611 voters 43% thinking they voted for the winner.

D. z=3.70

An Electronic System 839 challenges and 327.

C. z=3.47

randomly selected workers 61% got their jobs... 0.05 significance level... P-Value of 0.0026

D. Reject the null hypothesis, sufficient evidence.

when posed with question do you believe the loch ness monster exists. out of 21,346 responses 64% yes. 0.01 significance

A. Reject the null hypothesis, sufficient evidence

basic knowledge exam claim that more than 70% of adults should pass the test. 584 out of 875 passed.

A. z=-2.10

Clinical trials flu symptoms 724 patients treated with the medicine. 72 had side effects. 6% rate.

B. z=4.47

recent poll of 3011 adults 73% say they use the internet. 0.05 significance to test claim.

C. 0.0057; reject the null hypo

recent taste test 1017 out of 1250 people could not tell differnec of soda. more than 80% cant tell difference.

D. z=1.20