An electronic device is claimed to remain alive under water on average for 26 minutes (assume under-water lifetimes are approximately Normal). A random sample of 25 devices were tested and found to be alive on average for 24 4 minutes with a sample standard deviation of 4 minutes. If the computed t-value falls into the interval that contains 97% of all critical values, the claim will be satisfied Click here to view page 1 of the table of critical values of the t.distribution Click here to view page 2 of the table of critical values of the t-distribution The claim can V satisfied, because the computed t-value is and it v between the critical values and corre (Round to three decimal places including any zeros.) does not fall falls

An electronic device is claimed to remain alive under water on average for 26 minutes (assume under-water lifetimes are approximately Normal). A random sample of 25 devices were tested and found to be alive on average for 24 4 minutes with a sample standard deviation of 4 minutes. If the computed t-value falls into the interval that contains 97% of all critical values, the claim will be satisfied Click here to view page 1 of the table of critical values of the t.distribution Click here to view page 2 of the table of critical values of the t-distribution The claim can V satisfied, because the computed t-value is and it v between the critical values and corre (Round to three decimal places including any zeros.) does not fall falls

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

A study showed that females’ body temperatures are approximately normally distributed with a mean of 98.40F, and a population standard deviation of 0.700F. Find the female body temperature at the 90th percentile.
The lifetime of a particular component is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. What is the 30th percentile of component lifetimes?
The heart rate of 20 patients in the ICU have a mean of 95.3 beats per minute and a standard deviation of 19.6 beats per minute. Are heart rates from the ICU patients unusual given a normal heart rate has a mean of 72 beats per minute? What is the t-stastic?
The pregnancy length of new mothers in a population is 267 days with a standard deviation of 10 days. What is the minimum pregnancy length that can be in the top 10% of pregnancy lengths? Assume that it is normal distribution.
Speeds of cars in an expressway are monitored by high-speed camera units. The minimum speed of cars in the expressway is 60 kph and the maximum speed is 100 kph. Cars going below the minimum, or going above the maximum, are apprehended. Suppose that speed of the cars on the expressway are normally distributed with a mean of 75kph and a standard deviation of 10 kph. What percentage of the cars travelling on the expressway will not be apprehended? Note: Write your answer as percentage with two decimal places (i.e. 87.26%).
The lifetime of a particular component is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. What is the 80th percentile of component lifetimes?
What raw score for age corresponds to a z- score of +4.50, given a mean of 12.0 years and a standard deviation of 4.0 years?
Suppose the masses of a batch of 2000 potatoes have a mean of 60 grams with a standard deviation of 8 grams. Assuming the weights have a normal distribution, predict the number of potatoes that would have masses between 45 and 55 grams. Sketch the distribution curve, shade the required probability, and show horizontal scales the population parameters and the z-scores. Solve the problem
The mean life of a certain type of motor is 10 years with a standard deviation of 2 years.Assume that the useful life of an engine follows a normal distribution. The manufacturerreplaces all motors that fail free of charge while under warranty. If the company is willing toreplace only 3% of the motors that fail, how long should a warranty be?
The scores on a standardazed test are normally distributed with a mean of 115 and standard deviation of 7. What test score is 0.45 standard deviations below the mean?
Assume that an internet provider monitors the amount of time that every customer accesses their home internet connection each day. The amount of time that all of their customers access their home internet connection is normally distributed. They access it for an average of 8.9 hours per day with a standard deviation of 2.1 hours. What proportion of samples of 100 will spend less than an average of 9 hours on their home internet per day? Your answer should have 4 decimal places.
Bacteria in a culture live for an average time of three hours with a standard deviation of 15 minutes. If it wasn’t normally distributed, at least what fractionof the bacteria live between one and five hours?