Answer:
(a) H0:μ1=μ2; Ha:μ1≠μ2, which is a two-tailed test.
Step-by-step explanation:
We formulate the
H0: μ1=μ2; null hypothesis that the two means are equal and alternate hypothesis that the two mean are not equal.
Ha:μ1≠μ2 Two tailed test
Test statistic used is
t= x1`-x2` / s√n as the variances are equal and sample size is same
T value for 9 degrees of freedom for two tailed test at α = 0.05 is 2.26
P- value for t test for 9 degrees of freedom is 0.125 from the table.
Hence only a is correct .
She should use the conversion factor of 100 centimeters to 1 meter and also the conversion factor of 60 minutes to 1 hour.
Answer: 2 or more.
X and Y could be anything, so there are at least two answers
On the unit cirlce, the cosine of an angle is negative whenever the angle falls in the interval
.
If you recall your special triangles, this cosine occurs for angles of
and
.
More generally, this occurs for
and
, where
is an integer.
