calculate sample step by step

3. A group of researchers wants to conduct a survey in the community to determine the number of families who own a vehicle. The confidence interval is 0.03 and the confidence level is 95.5%. Determine the sample size. If the number of N (population) is known to be equal to 10,000. what will be the sample Size? 4 A random stud}.r ls to be conducted at a unlversitt.r to determine the number of students who use the library The error to observe will be 4% with a risk of 0.045. What will be the sample size iflhe university has 3200 students? 5. In an elementary school with a population of 1200 students, it is desired to estimate the average level of students who bring a snack to school daily.r with 95% confidence. A pilot study was carried out and it was found: x = 22.3 and s = 8.6. The research team notes that they can accept up lo an error of it .5. Calculate lhe sample lo determine the number of students who bring a snack to school