Also What are the mean and standard deviation for this distribution? (Round to f

Question

Also What are the mean and standard deviation for this distribution? (Round to four decimal places as needed.)

Homework: Chapter 5 Homework Save Score: 067 of 1 pt HW Score: 92.67% 9.27 of 10 pts 5.2.21-T A recent stud fund hat ?% c workers bel een tie aigeso 20 29 cash ou ter re remert ocounts a. Whst is the probabiity that exacdy 9 workers cashed out their retirement aocounts? Tha prokahi ian2179 Roured to our b. wehatisc probablity tha: al 14 workerfrem the sample cashed out thair retiremant account? The probeblity i 0.0024 (Round to four decimal places needed.) C. What is tha pmhabilty that 11or tewer orkans casihad out their reinamant accounta? The probablity is Round to four dacimal placcs a nsoded.) hen the ose her b5 or ovs to ? new ermp o er. ? ste parts ? through e be ow wsed on ? random saml e 4 workers between te ages o 20-29 wno ost her obs or changed emp Oye

Explanation / Answer

solution:-
given that p = 0.65 , n = 14
a. p(x =9) = 0.2178

b.p(x = 14) = 0.0024

c. p(x ? 11) = 0.9161

by formula p(x = x) = ncr * p^r * q^n-r
mean = n * p = 0.65*14 = 0.9160
standard deviation = sqrt(14*0.65*0.35) = 1.7847

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