Question

T or F

If the test statistic for a left-tailed test is z = – 1.85, then P-value is 0.9678.

Answer 1

Given that the test statistic for a left tailed test is z=-1.85.

Now, the test is left tailed; which means, we have to find the P-value by calculating the area to the left of the test statistic.

So, basically we have to find the area to the left of z=-1.85 for a standard normal distribution.

Now, we have to find

Where, phi is the distribution function of the standard normal variate.

Now, from the standard normal table, this becomes

So, the P-value is 0.0322.

So, the statement " If the test statistic for a left-tailed test is z = – 1.85, then P-value is 0.9678." is a FALSE statement.