Answer:
269
Step-by-step explanation:
The margin of Error is E = 0.05
The level of significance is, α = 1 - confidence level = 1 - 0.9 = 0.1
Assume that the proportion is, p =0.5
From the standard normal table, observe that the critical value of Z for two tail test and 10% level of significance is 1.64
The calculation of sample size is as follows: n = (Z/E)²p(1-p)
n = (1.64/0.05)²0.5 (1 - 0.5)
n = (1.64/0.05)² 0.25
n = 1075.84 × 0.25
n = 268.96 ≈ 269
The required sample size with the given margin of error approximately is 269. This value indicates the size of the customers who are using this company’s products.
Answer:
100
Step-by-step explanation:
Since In total there is 25 attractions and shops , you would add them because there is still a chance that if it was randomly selected you would get a attraction. If 5/20 is the probability, you would divide 5 by 20 because the “ / “ sign means divide. And if it said 5 of 20 , it would mean multiply as “of” means multiply. So after you do the 5 divided by 20 , it equals 0.25, which comes out to a quarter of 100 which means it is 1/4 chance of getting a gift shop chosen. Answer : 1/4.
Hope I helped, please mark as brainliest!
Answer:
not enough info i dont think this is the whole question
Step-by-step explanation:
