Ask Question, Ask an Expert


Ask Statistics and Probability Expert

Confidence interval for population mean.

The mean weight of trucks travelling on a particular section of I-475 is not known. A state 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 15.80 tons. The population standard deviation is 3.8 tons. What is the 95 percent interval for the population mean?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M919903

Have any Question? 

Related Questions in Statistics and Probability

Letnbspnbspbe a sequence of iid random variables with

Let   be a sequence of IID random variables with finite mean and variance. Show that the sequence of sample means converges in the MS sense.

Letnbspnbspbe a random sum of discrete iid random

Let   be a random sum of discrete IID random variables. Further, let   be the probability-generating functions of  N and X, respectively. Find the probability-generating function of S assuming that is independent of the ...

Let x be the number of heads observed in five tosses of a

Let X be the number of heads observed in five tosses of a fair coin. Then, X fair dice are thrown. Let Y be the sum of the numbers showing on the dice. Determine the mean and variance of Y.

A random process xt has the following member

A random process X(t) has the following member functions:    Each member function occurs with equal probability (a) Find the mean function  (b) Find the autocorrelation function  (c) Is the process WSS? Is it stationary ...

Sat verbal scores are normally distributed with a mean of

SAT verbal scores are normally distributed, with a mean of 500 and standard deviation of 100. You randomly select a test taker. What's the probability that s/he scored between 500 and 700?

Multiple choice items1 which of the following are

Multiple Choice items: 1. Which of the following are assumptions underlying the use of parametric tests (based on the normal distribution)? a. the data should be normally distributed b. the samples being tested should ha ...

Letnbspwhere a t is a wide sense stationary random process

Let  where A (t) is a wide sense stationary random process independent of  be a random variable distributed uniformly over   Define a related process   are stationary in the wide sense but that the cross-correlation   be ...

Several questions refer to the basic sample persons whose

Several questions refer to the Basic Sample: persons whose age is in the 21-27 (inclusive) range, who are working at least 40 hours per. Consider the Basic Sample only. Create standardizations (z-scores) of for the varia ...

Recall the random variables ofnbspgiven exercise that are

Recall the random variables of given Exercise that are uniformly distributed over the region  (a) Find the conditional PDFs  (b) Find the conditional CDFs (c) Find    Exercise A pair of random variables, ( X , Y ) , is e ...

Since the q-function represents the tail probability of a

Since the Q-function represents the tail probability of a Gaussian random variable, we can use the various bounds on tail probabilities to produce bounds on the Q-function. (a) Use Markov's inequality to produce an upper ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate