1-
Find the z-score for which 70% of the distribution's area lies
to its right.
A. - 0.98
B. - 0.47
C. - 0.81
D. - 0.53
2-
Find the z-scores for which 98% of the distribution's area lies
between - z and z.
A. (- 2.33,2.33)
B.( - 1.645,1.645)
C.( - 0.99,0.99)
D.(- 1.96,1.96)
3- Assume that the heights of women are normally distributed
with a mean of 62.4 inches and a standard deviation of 2.5 inches.
Find Q...
Find z such that 5.4% of the standard normal curve lies
to the right of z. (Round your answer to two decimal
places.)
z =
Find the z value such that 83% of the standard normal
curve lies between −z and z. (Round your answer
to two decimal places.)
z =
Thickness measurements of ancient prehistoric Native American
pot shards discovered in a Hopi village are approximately normally
distributed, with a mean of 5.1 millimeters (mm) and a standard
deviation...
Find the z-score that corresponds to an area of 0.1235 in the
right tail.
Find the z-score and type in your decimal answer rounded to two
decimal places (rounded to the nearest hundredth).
z=
2. Find the standart normal-curve area that lies
a) between z= -0.55 and z=0.55;
b) to the right of z =-1.59;
c) to the left of z=0.67;
d) between z=1.99 and z=2.37
Part I
Find the standard-normal curve area that lies a)To the right of
0.65 b) To the left of z = -2.13 c) between z = -0.34 and z =
0.62.
d) A tire store finds that the thread life of its tires is
normally distributed, with a mean of 26,640 miles and a standard
deviation of 4000 miles. The store sold 9000 tires this month. How
many of them can be expected to last between 25,000 and 30,000
miles?...