<span>One of your goals you have set for your company is to expand our product line the statement is not clear and it's not measurable. The product line is the concentration of the same products which are categorized from the same brand. </span>
Given the following:
Sigma =
17.8
E =
44 points
Confidence interval = 99% - 2.58
Confidence interval = 95% - 1.96
In order to get the sample size,
use the formula:
For 99% confidence level
n =
[ (z value x s) / E ]2
n =
[ (2.58 x 17.8) / 44]2
n =
1. 089 or 1 (rounded up)
For 95% confidence level
n =
[ (z value x s) / E ]2
n =
[ (1.96 x 17.8) / 44]2
n =
0.628 or 1 (rounded up)
As we decrease the confidence
level, from 99% to 95%, our confidence interval gets smaller. In additional, to
be more confident that our interval actually comprises the population mean we
have to increase the size of the interval. To ease that trade off between level
of confidence and the precision of our interval is to primarily increase the
sample size.
Answer:
Explanation:
S/N Age range Adult Population Population Internet Users
A 18 - 29 478 454
B 30 - 49 833 741
C 50 and above 1644 1058
Total 2955 2253
a) Let E = Estimate proportion and A = Internet users
Hence, n(E) = 478 and n(A) = 454
∴ Probability of Internet users (18 - 29), P(A) = n(A)/n(E) = 454/478 = 0.9498 (94.98%)
b) n(E) = 833 and n(B) = 741
∴ Probability of Internet users (30 - 49), P(B) = n(A)/n(E) = 741/833 = 0.8896 (88.96%)
c) n(E) = 1644 and n(C) = 1058
∴ Probability of Internet users (50 and above), P(C) = n(C)/n(E) = 1058/1644 = 0.6436 (64.36%)
d) Let Et = Total estimate proportion
Hence, n(Et) = 2955 and n(A) = 454
∴ Probability of 18 - 29 age range using Internet overall Pt(A) = n(A)/n(Et) = 454/2955 = 0.1536 (15.36%)
Answer: exploratory research
Explanation: In simple words, exploratory research refers to the research which is conducted for problem that involves knowing what is going on in the current situation. These researches results in development of conclusion that is completely new.
In the given case, Nancy bales has to make a research about a product that is new to the market. She has to conclude if that item is better than the i-pod or not.
Hence we can conclude that Nancy has to perform exploratory research.
