65  Inferential statistics quiz

🏠 Self-study

Here are some formative quiz questions on inferential statistics. If you can answer all of them correctly without guessing, you’re well prepared for the lab. If you missed any—or got any right by guessing—please revisit your PSGY1004 lecture materials on inferential statistics.

Decreasing the standard deviation in a sample would have which of the following effects?

It will be easier to reject the null hypothesis.The standard error will be smaller.The standard deviation of the sampling distribution will be smaller.All of the above.

If the p-value is 0.00001, this means that…

The result is significant.The null hypothesis is wrong.Both of the above.None of the above.

A p-value of 0.1 means that…

There is a 10% chance that the alternative hypothesis is correct.Assuming that the alternative hypothesis is true, the probability of getting this outcome or a more extreme one was 10%.Assuming that the null hypothesis is true, the probability to get this outcome or a more extreme one was 10%.There is a 10% chance that the null hypothesis is correct.

If the p-value is 0.9, this means that…

The null hypothesis is true.You reject the null hypothesis.You accept the null hypothesis.You fail to reject the null hypothesis.

A t-distribution is similar to a normal distribution, except that…

It tends to have lighter tails.It is not symmetrical.It tends to have heavier tails.

What is the percentage of values that lies between -1 and +1 standard deviations of a normal distribution?

68509995