Using the normal distribution, there is a 0.1587 = 15.87% probability that’s a car picked at random is traveling at more than 100 km/hr.
<h3>Normal Probability Distribution</h3>
The z-score of a measure X of a normally distributed variable with mean and standard deviation is given by:
- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:
The probability that’s a car picked at random is traveling at more than 100 km/hr is <u>one subtracted by the p-value of Z when X = 100</u>, hence:
Z = 1
Z = 1 has a p-value of 0.8413.
1 - 0.8413 = 0.1587.
0.1587 = 15.87% probability that’s a car picked at random is traveling at more than 100 km/hr.
More can be learned about the normal distribution at brainly.com/question/28096232
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IS calculation is not reasonable, first take all three totals and add them together. His total is $107.68, compared to his calculated $87.22 he is off by $20.64.
Answer:
okay your surface is the area is the bo
Step-by-step explanation:
Answer: (0.1118, 0.3454)
Step-by-step explanation:
Confidence interval for population proportion is given by :-
, where = sample proportion , n= sample size, = critical z-value for c confidence level.
Let p = the proportion of all households in Cherry Creek that pretend not to be home on Halloween.
Given : n= 35
Critical z-value for 90% confidence level =1.645
A 90% confidence interval for p, the proportion of all households in Cherry Creek that pretend not to be home on Halloween:
∴ Required confidence interval : (0.1118, 0.3454)
Answer:
Option D). 171 feet is correct
Step-by-step explanation:
Given that a toy rocket is launched from 42 feet above the ground.
The height is rocket is given by f(t)=
To find the height of the rocket above the ground after 3seconds :
Given that f(0)=42
Take t=3
f(t)=
f(3)=
f(3)=
f(3)=
f(3)=171 feet
Therefore, option D). 171 feet is correct