The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs an estimate of the population mean. He selects and weighs a random sample of 49 trucks and finds the mean weight is 15.8 tons. The population standard deviation is 3.8 tons. What is the 95% confidence interval for the population mean?
Answers
Answer:
(14.7 , 16.9)
Step-by-step explanation:
it is given that tons
σ=3.8 tons
n=49
at 95% confidence level α=1-.95=0.05
=1.96 ( from the standard table)
at 95% confidence level the coefficient interval for μ is
(14.7, 16.9)
Related Questions
What is the value of the expression 2z + 2w when z=7 and w=5
Convert to exponential equation log9 1/81= 2
What is 20% off of £1.85? ^_^
Please help need answer asp
b) Calculate how many people attended the wedding if the wedding cost totalled $3912.50.
Answers
Answer:
a) 45.50p + 500
b) 45.50p + 500 = 3912.50
p = 70
Step-by-step explanation:
p = number of people
$45.50 for a meal for each person, so:
45.50p
The constant is $500, so let's add that to the expression:
45.50p + 500
Answers
Answer:
x = (k-14)/5
Step-by-step explanation:
5x + 14 = k
Subtract 14 from each side
5x + 14-14 = k-14
5x = k-14
Divide by 5
5x/5 = (k-14)/5
x = (k-14)/5
Answer:
k - 14/5
Step-by-step explanation:
5x + 14 = k
On subtracting 14 on both sides,
5x = k - 14
On dividing by 5 on both sides,
x = k - 14/5
Therefore, the value of x = k-14/5
Hope this helps You
Please mark as the Brainliest
Thank You
How do you solve this equation?
Answers
8=8p+13-3p
Subtract 8p and 3p
Thats 5p
Now
8=5p + 13
Subtract 13 from 8
-5 = 5p
Divide -5 by 5
-1 = p
8=8p+13-3p
group like terms
8=8p-3p+13
add like terms
8=5p+13
minus 13 from both sides
8-13=5p+13-13
-5=5p+0
-5=5p
divide both sides by 5
-5/5=5p/5
-1=1p
-1=p
p=-1
2x^2+17x-21
Answers
-b +/- (b^2-4ac)^1/2
2a
so
-17 +/- (17^2-4(2)(-21))^1/2
2(2)
-17 +/- (457)^1/2
4
so the zeros are roughly 1.094 and -9.594
Answers
Answer: $19968
Step-by-step explanation: Assuming the electric technician works 52 weeks a year with an average of of $40 of paid work, the electrician would make about $19,968 or close to $20,000 a year.
Final answer:
To calculate the technician's annual salary, multiply their hourly rate by the number of hours worked in a week and then multiply that by the number of weeks in a year. In this case, the technician is paid $9.60 per hour and works 40 hours per week.
Explanation:
To calculate the technician's annual salary, we need to multiply their hourly rate by the number of hours they work in a week and then multiply that by the number of weeks in a year.
In this case, the technician is paid $9.60 per hour and works 40 hours per week. So their weekly salary is $9.60 x 40 = $384. To find their annualsalary, we multiply the weekly salary by the number of weeks in a year, which is 52.
Therefore, the technician's annual salary is $384 x 52 = $19,968.
Learn more about Calculating Annual Salary here:
#SPJ12
Answers
Answer:
the answer to this is 108 cm³
Step-by-step explanation: