The normal distribution curve for the problem is shown below
We need to standardise the value X=405.5 by using the formula
We now need to find the probability of z=0.32 by reading the z-table
Note that z-table would give the reading to the left of z-score, so if your aim is to work out the area to the right of a z-score, then you'd need to do:
from the z-table, the reading
gives 0.6255
hence,
The probability that the mean weight for a sample of 40 trout exceeds 405.5 gram is 0.3475 = 34.75%
Answer:
0.5
Step-by-step explanation:
Given that height of 7 year old children are normally distributed with mean =49 inches and std deviation = 2inches
Brenda is 50 inches tall
This means her X score is 50
To convert this X score to Z score we use the formula given below
Here we know all the values of x, mu and sigma
Just substitute
Z score
=
Thus Z score of Brenda is 0.5
Answer:
quadratic system quiz part 1 unit 6 lesson 9
Step-by-step explanation:
1)c:x=1,-3
2)b:6.2;9.1
3)a:1-7i
4)d:no real solutions
5)a: (0,3)
6)a:-3/4i,3/4i
7)c:(-4,0)(-1,3)
8)a
9)b:5i
Answer:
A to #4
B to #3
C to #1
D to #2
Step-by-step explanation:
A. 7 + 3² = 16
B. 5 - 2²=1
C. 2 · 2³ = 2^4
D. 3^4/3^1=27
Answer: A, arithmetic
Step-by-step explanation:
An arithmetic sequence has a constant difference between each term. If she spend 36 dollars each week, the first week would be 36 the second week would be 72, and so on.