Answer:
Sample size should be atleast 617
Step-by-step explanation:
given that a 95% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit.
i.e. margin of error <0.3
Std devition sample = 3.8
For 95% assuming sample size large we can use z critical value
Z critical = 1.96
we have

Sample size should be atleast 617 to get an accurate margin of error 0.3
Answer:
24.
Step-by-step explanation:
In a standard deck of 52 cards, there are four kings and four aces.
Permutation
gives the number of ways to choose
items out of a pile of
of these items. The equation for calculating
.
Consider: how many ways to choose two kings out of four? Assume that the order for choosing the two cards does not matter. The number of possible ways can be found using the following permutation:
.
Similarly, find the number of ways to choose three aces out of four.
.
Note that
- No card other than the two kings and the three aces are involved in this choice of five cards.
- The choice of the two kings is independent of the choice the choice of the aces. (Choosing some kings does not change the choices of aces, and vice versa for the choice of the kings.)
Therefore, multiply these two permutations to find the number of ways to choose these five cards:
.
Answer:
rounded is $207.66
Step-by-step explanation:
you start by doing 349(0.30) which would be 104.7
349-104.7=244.3
next you do 244.3(.15)=36.645
244.3-36.645= $207.655
Answer:
No it doesn't
Step-by-step explanation:
It doesn't because the numbers are not the same.