The average yearly Medicare Hospital Insurance benefit per person was $4064 in a year recent year. If the benefits are normally distributed with a standard deviation of $460, find the probability that the mean benefit for a random sample of 20 patients is more than $4100. Convert to a percentage and round to the hundredth.
A.) 25.00%
B.) 36.32%
C.) 48.63%
D.) 57.28
E.) 69.27%
Answer: E.) 69.27% P(? > 4100) = P (x-?/(?/?n) > 4100-4064/(460/?20)) = P(Z > .34999) ? .3669
Mathematics
You might also like to view...
Write the polynomial in two ways: with its missing terms and by leaving space for them.-2x2
A. -2x2 + 0x -2x2 B. -2x2 + 0x + 0x0 -2x2 C. -2x2 + 0x0 -2x2 D. None missing
Mathematics
Decide whether or not the set of ordered pairs defines a function.{(-3, -3), (-1, 5), (4, -7), (5, 3)}
A. No B. Yes
Mathematics
Find the mean for the frequency distribution. Round to the nearest tenth.
A. 6.6 B. 27.1 C. 24.1 D. 23.3
Mathematics
Compute the length of the given vector.p(t) = 13t2 and q(t) = t - 1, where t0 = 0, t1 = 
, t2 = 1
A. 
= 
; 
= 
B. 
= 0.5
; 
= 
C. 
= 13
; 
= 
D. 
= 
; 
= 13
Mathematics