Mario says that the expression 4+3n² has four terms: 4, 3, n, and 2. Is he correct? explain.
1 answer:
Mario says that the expression has four terms: 4, 3, n, and 2. Mario is incorrect
<em><u>Solution:</u></em>
Given that the expression is:
Given that, Mario says that the above expression has four terms
But Mraio is incorrect
Because the given expression has two terms only
4 is one of the term
is another term
So there are totally 2 terms only
A term can be a signed number, a variable, or a constant multiplied by a variable or variables
Here 3 is a constant multiplied by
So, is one term
Each term in an algebraic expression is separated by a + sign or - sign
Thus there are two terms in mario expression
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Answer:
1.86 < t < 2.31
Step-by-step explanation:
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the mean height actually is higher\lower than an specified value, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
Or like this:
Null hypothesis:
Alternative hypothesis:
If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:
(1)
t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
Calculate the statistic
We don't know on this case the calculated value and with the p value we can find it.
P-value
The first step is calculate the degrees of freedom, on this case:
Since is a one side test the p value would be:
And we can find the critical value with the following excel code:
"
=T.INV(1-0.035,8)" and we got
And cannot be a lower tail test since all the options have positive values for the statistic. So on this case the best option is:
1.86 < t < 2.31