Question

10:15 GX 1.51%. e s o s IL Multiple choice (60 p cholesben 1. The shape of the Men deviation 2. The standard Standard deviat i le devii d curve la tribal the value i n 15 3. Ir the were mad e is 2.5 or distribution is 45 and standard deviation of normal distributors is that the value of x for a distribution is 97.5 47.5 e 373 4 675 See other value. 4. Considering the normal distribution, pal is increased and height of surveis dered for the a Larp value of the mean Smaller ve of the mean s. Large value of the standard deviati a smaller value of the standard deviatine The score in the standard somal distribution for the 95 percentile is -1.64 1 .% 2.00 1.64 All of the following increase the width of a confidence interval of a mean scept Increased confidence level ncreased sample size Increased variability d. Decreased sample size Jada Owens Tuesday, Oct 15, 4:32 PM 13 Likes

Answer 1

Solution-1:

shape of normal curve depends on standard deviation

STANDARD DEVIATION

OPTION B

Solution-2

Z follows normal distribution with mean 0 and sd=1

so symmetric about zero

OPTION D

Solution-3:

z=2.5

z=x-mean/stddev

2.5=x-45/3

x=2.5*3+45

x= 52.5

:OPTION E

Solution-4:

spread increased mean decreased

smaller value of standard deviation

0, 0,a-2 -6 2 6

OPTION D

Solution-5:

For 95 th percentile

qnorm(0.95)

1.644854

z=1.64