Answer:
Step-by-step explanation:
Given that a group of students estimated the length of one minute without reference to a watch or clock, and the times (seconds) are listed below.
Data set is as ollows:
70 79 38 63 44 23 62 61 67 50 61 70 94 87 65
H0: mu = 60 sec
Ha: mu not equals 60 sec
Mean diff = 2.27
Test statistic = 2.27/SE =0.4815
p value =0.6376
Since p>0.05, we accept null hypothesis
i.e. there is statistical evidence to say that students are reasonably good at estimating one minute
Answer:
Step-by-step explanation:
The answer uses the unit circle and that sine and cosecant are reciprocals.
The first choice doesn't even fit the criteria that is between
and
(inclusive of both endpoints) because of the
.
Let's check the second choice.
.
which means
which is not greater than 1.
So we can eliminate second choice.
Let's look at the third.
which means
.
isn't defined because
.
So we are eliminating 3rd choice now.
Let's look at the fourth choice.
which means
and not greater than 1.
I was looking at the rows as if they were choices.
Let me break up my choices.
So we said doesn't work because it is not included in the inequality
.
How about ? This leads to
which doesn't exist because
.
So neither of the first two choices on the first row.
Let's look at the second row again.
We said worked but not
Let's look at the choices on the third row.
We said worked but not
Let's look at at the last choice.
We said it gave something less than 1 so this choice doesn't work.