The random variable X is normally distributed. Also, it
is known that P(X > 173) = 0.04. [You
may find it useful to reference the z
table.]
a. Find the population mean μ if the
population standard deviation σ = 10.
(Round "z" value to 3 decimal
places and final answer to 2 decimal
places.)
b. Find the population mean μ if the
population standard deviation σ = 17.
(Round "z" value to 3 decimal
places and final answer to 2 decimal
places.)
c. Find the population standard deviation
σ if the population mean μ = 154. (Round
"z" value to 3 decimal places and final answer to 2
decimal places.)
d. Find the population standard deviation
σ if the population mean μ = 138.
(Round "z" value
to 3 decimal places and final answer to 2 decimal
places.)
The random variable X is normally distributed. Also, it is known that P(X > 173) =...
The random variable X is normally distributed. Also, it is known that P(X > 148) = 0.04. [You may find it useful to reference the z table.] a. Find the population mean μ if the population standard deviation σ = 13. (Round "z" value to 3 decimal places and final answer to 2 decimal places.) b. Find the population mean μ if the population standard deviation σ = 24. (Round "z" value to 3 decimal places and final answer to...
The random variable X is normally distributed. Also, it is known that P(X > 150) = 0.10. [You may find it useful to reference the z table.] a. Find the population mean μ if the population standard deviation σ = 15. (Round "z" value to 3 decimal places and final answer to 2 decimal places.) b. Find the population mean μ if the population standard deviation σ = 25. (Round "z" value to 3 decimal places and final answer to...
Let X be normally distributed with mean μ = 137 and standard deviation σ = 20. [You may find it useful to reference the z table.] a. Find P(X ≤ 100). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) b. Find P(95 ≤ X ≤ 110). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) c. Find x such that P(X ≤ x) = 0.340. (Round "z" value and...
Let X be normally distributed with mean μ = 3.3 and standard deviation σ = 2.3. [You may find it useful to reference the z table.] a. Find P(X > 6.5). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) b. Find P(5.5 ≤ X ≤ 7.5). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) c. Find x such that P(X > x) = 0.0485. (Round "z" value and...
Let X be normally distributed with mean μ = 22 and standard deviation σ = 16. [You may find it useful to reference the z table.] a. Find P(X ≤ 2). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) b. Find P(X > 6). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) c. Find P(2 ≤ X ≤ 26). (Round "z" value to 2 decimal places and final...
Let X be normally distributed with mean μ-126 and standard deviation σ-22. Mou may find it useful to reference the ztabel a. Find AX s 100). (Round z value to 2 decimal places and final answer to 4 decimal places.) PX 100) 0.1151 b. Find P95 sXs110). (Round "value to 2 decimal places and final answer to 4 decimal places.) P(95 sX s 110) c. Find x such that FXsx) = 0.410. (Round "z" value and final answer to 3...
Let X be normally distributed with mean μ. 126 and standard deviation σ-22. [You may find it useful to reference the ztable.] a. Find AX s 100). (Round" value to 2 decimal places and final answer to 4 decimal places.) POX S 100) b. Find P95 sX s110) (Roundr value to 2 decimal places and final answer to 4 decimal places.) P(95 SXS 110) c. Find x such that PXsX)-0.410. (Round " value and final answer to 3 decimal places.)...
25> Consider a variable known to be Normally distributed with unknown mean μ and known standard deviation σ-10. (a) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 25? The multiplier for a z confidence interval with a 95% confidence level is the critical value z. 1.960. (Enter your answer rounded to three decimal places.) margin of error 25 (b) What would be the margin of...
Let X be normally distributed with mean μ = 2.4 and standard deviation σ = 1.6. a. Find P(X > 6.5). (Round "z" value to 2 decimal places and final answer to 4 decimal places. b. Find P(5.5 ≤ X ≤ 7.5). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) c. Find x such that P(X > x) = 0.0869. (Round "z" value and final answer to 3 decimal places.) d. Find x such...
Let X be normally distributed with mean μ = 13 and standard deviation σ = 4. a. Find P(X ≤ 2). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) b. Find P(X > 4). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) c. Find P(7 ≤ X ≤ 12). (Round "z" value to 2 decimal places and final answer to 4 decimal places.) d. Find P(10 ≤ X...