WebSuppose a mobile phone company wants to determine the current percentage of customers aged 50+ who use text messaging on their cell phones. How many customers aged 50+ should the company survey in order to be 90% confident that the estimated (sample) proportion is within three percentage points of the true population proportion of … Web7 jan. 2015 · A 90% confidence interval means when repeating the sampling you would expect that one time in ten intervals generate will not include the true value. Based on what you're researching, is that acceptable? On the other hand, if you prefer a 99% confidence interval, is your sample size sufficient that your interval isn't going to be uselessly large?
90% Confidence Interval Calculator
Web15 jan. 2024 · The confidence level tells you how sure you can be. It is expressed as a percentage and represents how often the true percentage of the population who would pick an answer that lies within the confidence interval. The 95% confidence level means you can be 95% certain; the 99% confidence level means you can be 99% certain. Web8 okt. 2024 · Confidence intervals are one way to represent how "good" an estimate is; the larger a 90% confidence interval for a particular estimate, the more caution is required … crock pot kids recipes
What does it mean when a statistician says I’m 90% confident …
WebExpert Answer. Transcribed image text: 2. (10 points) 1) If p^= 30%,n = 70, with the confidence level 90%. Find the SE (p^), and ME (rounded to 2 decimal places)? 2) Let p^= 30%,ME ≤ 3%, with the confidence level 95%. Find the sample size n. 3) Let p^= 20%,ME ≤ 2%, and n = 937. Find the confidence level. Previous question Next question. WebIf the confidence level is 99%, what is the value of a? Please label the values above as one of the This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer Question: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite pie. Web9 nov. 2024 · Most statistics (including the one quoted above) are given as 95 percent confidence intervals, which mean that there is a 95 percent chance that the true mean … crock pot kielbasa and pierogies casserole