Answer:
Step-by-step explanation:
Given
Solving (a); Point estimate of mean
To do this, we simply calculate the sample mean
Solving (b); Point estimate of standard deviation
To do this, we simply calculate the sample standard deviation
<em>Note that: The sample mean and the sample standard deviation are the best point estimators for the mean and the standard deviation, respectively.</em>
<em>Hence, the need to solve for sample mean and sample standard deviation</em>
Answer:
The values of 'x' are -1.2, 0, 0, or
.
Step-by-step explanation:
Given:
The equation to solve is given as:
Factoring from all the terms, we get:
Now, rearranging the terms, we get:
Now, factoring from the first two terms and 6 from the last two terms, we get:
Now, equating each factor to 0 and solving for 'x', we get:
There are 3 real values and 2 imaginary values. The value of 'x' as 0 is repeated twice.
Therefore, the values of 'x' are -1.2, 0, 0, or
.