ZuoTi.Pro
Question

Statistics and probabilty

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 mean. He selects a random sampleof 49 trucks passing the weighing station and finds the mean is 15.8 tons, with a standard deviation of the sample of 4.2 tons. What is the probabilty that a truckwill weigh less than 14.3 tons?
math   statistics and probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1
The probability is
P(X<14.3)
=P((X-mean)/s < (14.3-15.8)/4.2 )
=P(Z<-0.36)
= 0.3594 (check standard normal table)
answered by: vedrana
1 0
Add a comment
Know the answer?
Add Answer to:
Statistics and probabilty
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 2 points Save Answer The mean weight of trucks traveling on a particular section of Highway...

    2 points Save Answer The mean weight of trucks traveling on a particular section of Highway 401 is not known. A provincial highway inspector needs an estimate of the mean. He selects a random sample of 49 trucks passing the weighing station and finds the mean is 15.8 tons, with a standard deviation of the sample of 3 8 tons. What is the 95 percent interval for the population mean? O a 13.2 and 17.6 Ob 16.1 and 18.1 Oc...

  • The mean weight of trucks traveling on a particular section of I-475 is not known. A...

    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 mean. He selects and weighs a random sample of 46trucks and finds the mean weight is 17.9 tons. The population standard deviation is 3.9 tons. What is the 95% confidence interval for the population mean?

  • A highway inspector estimating the total daily weight of trucks crossing a bridge selects a random...

    A highway inspector estimating the total daily weight of trucks crossing a bridge selects a random sample of 49 trucks and finds a mean of 15.8 tons with standard deviation of 3.85 tons. The most recent daily count of trucks crossing the bridge is 8,114. The lower bound of the 98 percent confidence interval for the total daily weight (in thousands of tons, correct to three decimal places) is:

  • problems 4, 5, 6, 11 and 13 If the population standard deviation was doubled to 10.4...

    problems 4, 5, 6, 11 and 13 If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...

  • 1. Many companies use a incoming shipments of parts, raw materials, and so on. In the...

    1. Many companies use a incoming shipments of parts, raw materials, and so on. In the electronics industry, component parts are commonly shipped from suppliers in large lots. Inspection of a sample of n components can be viewed as the n trials of a binomial experimem. The outcome for each component tested (trialD will be that the component is classified as good or defective defective components in the lot do not exceed 1 %. Suppose a random sample of fiver...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT