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The lengths of human pregnancies are normally distributed with a mean of 253 days and a standard deviation of 15 days. What is the probability That a pregnancy last at least 300 days? Round to four decimal places. 0 A. [1.0154 0 B. [1.9834 0 C. [1.4334 0 D. 0.01m Amagazine provided results from a poll nf1Ul] adults who were asked to identify their favorite pie. Among the 1mm respondents, 13% chose chocolate pie, and the margin of error was given as i 3 percentage points. What values do 6 a n, E, and p represent? If the condence level is 90%, what is the value of or? The value 0pr is The value ofii is The value of n is The value of E is The value of p is If the condence level is 90%, what is the value of I]? a: E (Type an integer or a decimal. Do not round.) Find the critical value Zo> that corresponds to the given confidence level. 86% Za/ 2 'Round to two decimal places as needed.)d) 1Write a statement that correctly interprets the condence interval. Choose the correct answer below. 0 A. There is a 90% chance that the the value of the population proportion will tall between the lower bound and the upper bound. 0 B. One has 90% condence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion. O C. 90% ot sample proportions will fall between the lower bound and the upper bound. 0 D. One has 90% condence that the sample proportion is equal to the population proportion. Use the sample data and condence level given below to complete parts (a) through [d]. Aresearch institute poll asked respondents ifthey felt vulnerable to identity theft. In the poll, n =945 and K=533 who said "yes." Use a 90% condence level. a Click the icon to View a table of: scores. all Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E = (Round to three decimal places as needed.) c) Co nsthct the condence interval. D'WD (Round to three decimal places as needed.) Salaries of 36 college graduates who took a statistics course in college have a mean, x, of $65,500. Assuming a standard deviation, o, of $10,249, construct a 99% confidence interval for estimating the population mean u. Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $
0.97). Round to four decimal places. O A. 0.1660 O B. 0.8340 O C. 0.1685 O D. 0.1922
