Question

The mean incubation time of fertilized eggs is 21days. Suppose the incubation times are approximately normally distributed with a standard deviation of 11day.

(b) Determine the incubation times that make up the middle 97%.

Answer #1

Given that,

mean = = 21

standard deviation = = 11

middle 97% of score is

P(-z < Z < z) = 0.97

P(Z < z) - P(Z < -z) = 0.97

2 P(Z < z) - 1 = 0.97

2 P(Z < z) = 1 + 0.97 =1.97

P(Z < z) =1.97 / 2 = 0.985

P(Z <2.17 ) = 0.985

z ± 2.17 using standard normal (Z) table

Using z-score formula

x= z * +

x= -2.17*11+21

x= 2.87

z = 2.17

Using z-score formula

x= z * +

x= 2.17*11+21

x= 44.87

The mean incubation time of fertilized eggs is 20 days. Suppose
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standard deviation of 1 day. (a) Determine the 14th percentile for
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The mean incubation time of fertilized eggs is 19 days. Suppose
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standard deviation of 1 day.
(a) Determine the 10th percentile for incubation times.
(b) Determine the incubation times that make up the middle 95%
of fertilized eggs.

The mean incubation time of fertilized eggs is 21 days. Suppose
the incubation times are approximately normally distributed with a
standard deviation of 1 day.
(a) Determine the 20th percentile for incubation times.
(b) Determine the incubation times that make up the middle
39%.

The mean incubation time of fertilized eggs is 23 days. Suppose
the incubation times are approximately normally distributed with a
standard deviation of 1 day. (a) Determine the 11th percentile for
incubation times. (b) Determine the incubation times that make up
the middle 39%. （2 numbers）

Chapter 7.2 Question 14
The mean incubation time of fertilized eggs is 23 days.
Suppose the incubation times are approximately normally distributed
with a standard deviation of 1 day.
A.) Determine the 17th percentile for incubation
times.
B.) Determine the incubation times that make up the
middle 95%

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The mean incubation time for a type of fertilized egg kept at a
certain temperature is
1818
days. Suppose that the incubation times are approximately
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11
dayday.
Complete parts (a) through (e) below.
(a) Draw a normal model that describes egg incubation times of
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Choose the correct graph below.
Click here to view graph d.
LOADING...
Click here to view graph c.
LOADING...
Click here to view graph b.
LOADING......

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