a)
for95% CI crtiical Z = | 1.960 | from excel:normsinv(0.975) |
standard deviation σ= | 15.300 | |
margin of error E = | 4 | |
required n=(zσ/E)2 = | 57 | Rounding up |
b)
for95% CI crtiical Z = | 1.960 | from excel:normsinv(0.975) |
standard deviation σ= | 15.300 | |
margin of error E = | 2 | |
required n=(zσ/E)2 = | 225 | Rounding up |
c)
d)
for99% CI crtiical Z = | 2.576 | from excel:normsinv(0.995) |
standard deviation σ= | 15.300 | |
margin of error E = | 4 | |
required n=(zσ/E)2 = | 98 | Rounding up |
a through d please People were polled on how many books they read the previous year....
People were polled on how many books they read the previous year. Initial survey results indicate that s= 19.3 books. Complete parts (a) through (d) below. (a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 95% confidence? This 95% confidence level requires ____subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within two...
People were poled on how many books they read the previous year. Initial survey resuits indicate that s 10.6 books. Complete parts (a) through (d) below Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 90% confidence? This 90% confidence level requires L sub ects (Round up to the nearest subject ) (b) How many subjects are...
People were polled on how many books they read the previous year. Initial survey results indicate that s=15.8 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence?This 90% confidence level requires nothing subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books...
were poiled on how many books they read the previous year Intial survey results indicate that s 17.7 books. Complete parts (a) through (d) below Click the ioon to view a partial table of critical values (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% co nfidence? This 90% confidence level requires subjects (Round up to the nearest subject.) (b) How many subjects are needed to estimate...
People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 95% confidence? Initial survey results indicate that sigma = 13.1 books. A 95 % confidence level requires ____ subjects. (Round up to the nearest whole number as needed.)
People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that σ = 10.1 books. A 99% confidence level requires _____ subjects. (Round up to the nearest whole number as needed.)
#11 People were polled on how many books they read the previous year. Initial survey results indicate that s equals 15.7 books. Complete parts (a) through (d) below. a. How many subjects are needed to estimate the mean number of books read the previous year with 90% confidence? this 90% confidence requires ___ subjects? b. How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? this 90% confidence...
People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that o=12.9 books.
Construct the confidence interval for the population mean μ c: 0.95, x-16.8, σ: 9.0, and n-100 A 95% confidence interval for μ is OD (Round to one decimal place as needed.) 6.1.27 Use the confidence interval to find the margin of error and the sample mean (1.58,2.06) The margin of error is (Round to two decimal places as needed) 6.1.31 Find the minimum sample size n needed to estimate μ for the given values of c, o, and E. cz...
6.1.31 Question Help | * Find the minimum sample size n needed to estimate μ for the given values of c, σ, and E. cz 0.98, ơ-7.7, and E: 1 Assume that a preliminary sample has at least 30 members. n(Round up to the nearest whole number.) 6.1.47 Question Help People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book...