Answer:
Kindly check explanation
0.57691
0.4719
Step-by-step explanation
A.) The distribution of sample means must follow a normal distribution ;
Mean = 64 ; Standard deviation = 17 ;
Standard Error = s/sqrt(n) = 17 / sqrt(20) = 3.8013155
N(64 ~ 17)
Given that:
mean (m) = 64
Sample size (n) = 20
Standard deviation (s) = 17
Find
P(x < 67.3)
Z = (x - m) / s
Zscore = (67.3 - 64) / 17
Zscore = 0.1941176
P(Z < 0.194) = 0.57691 (Z probability calculator)
(c) Find P(x > 65.2).
Zscore = (65.2 - 64) / 17
Zscore = 0.0705882
P(Z > 0.0705) = 0.4719 (Z probability calculator)
Answer: D) 14.3%
Step-by-step explanation:
Conditional probability formula:
So, The probability he or she was dissatisfied, given that he or she had hip surgery = 
From the table, the number of persons who are dissatisfied and has hip surgery = 15
Total persons have hip surgery = 105
Required probability = 
In percent, Required probability = 14.3%
Correct option D) 14.3%
Answer:
471.24 Inches
Step-by-step explanation:
- V= πr²h
- (diameter=10, Radius = 5)
- V = (22/7 × 5 × 5) × 6
- V= 550 × 6
- V = 3300 ÷ 7
- V = 471.2389=round off
- V = 471.24 inches
