Week 4 Knowledge Check Homework Practice Questio…
Attempt 3 of 4
Written Mar 30, 2025 8:25 PM - Mar 30, 2025 9:47 PM
Attempt Score - 100 %
Overall Grade (Highest Attempt) - 100 %
Question 1 point
Find P(-1.96 ≤ Z ≤ 1.96). Round answer to 2 decimal places. Answer:
___0.95___
Hide ques on 1 feedback
In Excel,
=NORM.S.DIST(1.96,TRUE)-NORM.S.DIST(-1.96,TRUE)
Question 2 point
The length of a human pregnancy is normally distributed with a mean of 272
days with a standard deviation of 9 days (Bhat & Kushtagi, 2006). How many
days would a pregnancy last for the shortest 20%? Round answer to 2
decimal places. Answer: ___264.43___
Hide ques on 2 feedback
In Excel,
1
, =NORM.INV(0.2,272,9)
Question 3 point
Find P(Z ≤ 3). Round answer to 4 decimal places. Answer: ___0.9987___
Hide ques on 3 feedback
In Excel,
=NORM.S.DIST(3,TRUE)
Question 4 point
Which type of distribution does the graph illustrate?
Normal Distribution
Poisson Distribution
Uniform Distribution
Right skewed Distribution
Question 5 point
The manufacturer of a new compact car claims the miles per gallon (mpg)
for the gasoline consumption is mound-shaped and symmetric with a mean
2 of 26.3 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested,
Attempt 3 of 4
Written Mar 30, 2025 8:25 PM - Mar 30, 2025 9:47 PM
Attempt Score - 100 %
Overall Grade (Highest Attempt) - 100 %
Question 1 point
Find P(-1.96 ≤ Z ≤ 1.96). Round answer to 2 decimal places. Answer:
___0.95___
Hide ques on 1 feedback
In Excel,
=NORM.S.DIST(1.96,TRUE)-NORM.S.DIST(-1.96,TRUE)
Question 2 point
The length of a human pregnancy is normally distributed with a mean of 272
days with a standard deviation of 9 days (Bhat & Kushtagi, 2006). How many
days would a pregnancy last for the shortest 20%? Round answer to 2
decimal places. Answer: ___264.43___
Hide ques on 2 feedback
In Excel,
1
, =NORM.INV(0.2,272,9)
Question 3 point
Find P(Z ≤ 3). Round answer to 4 decimal places. Answer: ___0.9987___
Hide ques on 3 feedback
In Excel,
=NORM.S.DIST(3,TRUE)
Question 4 point
Which type of distribution does the graph illustrate?
Normal Distribution
Poisson Distribution
Uniform Distribution
Right skewed Distribution
Question 5 point
The manufacturer of a new compact car claims the miles per gallon (mpg)
for the gasoline consumption is mound-shaped and symmetric with a mean
2 of 26.3 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested,
