1. Of 149 randomly selected adults, 32 were found to have highblood pressure. Co

Question

1. Of 149 randomly selected adults, 32 were found to have highblood pressure. Construct a 95% confidence interval for thepercentage of all adults who have high blood pressure. a. (13.6%, 29.3%) b. (14.9%, 28.1%) c. (15.9%, 27.0%) d. (12.8%, 30.2%) e. (11.7%, 31.3%) 2. In a survey of 280 adults over 50, 75% said they weretaking vitamin supplements. Find the margin of error for thissurvey if we want a 99% confidence in our estimate of the percentof adults aver 50 who take vitamin supplements. a. 10.1% b. 5.07% c.18.6% d.13.3% e. 6.66% 3. A survey of shoppers is planned to see what percentage usecredit cards. Prior surveys suggest 63% of shoppers use creditcards. How many randomly selected shoppers must we survey in orderto estimate the proportion of shoppers who use credit cards towithin 4% 95% confidence? a. 504 b. 967 c. 394 d. 560 e. 1513 1. Of 149 randomly selected adults, 32 were found to have highblood pressure. Construct a 95% confidence interval for thepercentage of all adults who have high blood pressure. a. (13.6%, 29.3%) b. (14.9%, 28.1%) c. (15.9%, 27.0%) d. (12.8%, 30.2%) e. (11.7%, 31.3%) 2. In a survey of 280 adults over 50, 75% said they weretaking vitamin supplements. Find the margin of error for thissurvey if we want a 99% confidence in our estimate of the percentof adults aver 50 who take vitamin supplements. a. 10.1% b. 5.07% c.18.6% d.13.3% e. 6.66% 3. A survey of shoppers is planned to see what percentage usecredit cards. Prior surveys suggest 63% of shoppers use creditcards. How many randomly selected shoppers must we survey in orderto estimate the proportion of shoppers who use credit cards towithin 4% 95% confidence? a. 504 b. 967 c. 394 d. 560 e. 1513

Explanation / Answer

1)
b. (14.9%, 28.1%) 2) e. 6.66% 3) d. 560

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.