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Ten measurements of flow through a pipe are taken over time using a flow meter with a digital output. The flow meter has an accuracy of plus/minus 0.06 cubic feet per minute (CFM).
What is the probability that 5% of the people there are female? B. What is the probability that less than 90% of the people there are male? C. What is the expected number of females currently there?
A load cell is used to take repeated measurements of the force produced by a hydraulic cylinder. The load cell has an operating range of 0 to 310 Newtons, and an accuracy of 0.16% of full scale span
In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that 20% of all stock investors are retired people. In addition, 40% of all adults invest in mutual fun
Consider a sample of 30 WMU engineering alumni. The population average salary is $55,000 and amongst the 30 alumni the sample standard deviation is $12,000. Assuming the population is normally distr
In the particular cubic parsec selected around a little green planet, one finds exactly 23 stars. What is the probability that out of these 23 stars, there are exactly 4 starts in the cube with side
The mean score for this population of children was 106 points, with a standard deviation of 16.4 points. Consider a random sample of 36 children from this population, and let x represent the mean re
Find the probability distribution for x = the sum of a fair, four sided die and and fair, sixsided die. b) for x from problem 1, find the probability of having the sum be at least four. c) for x fro
A recent study focused on the amount of money single men and women saved monthly. The information is summarized below. Assume that the population standard deviations are equal.
You wish to deposit $500 per month into an account for 36 months. Assume your interest rate is equal to the prime interest rate. prime interest rate = 3.25
At the .01 Significance level, is there a difference in the mean number of times men and women send a twitter message in a day? What is the value of the test statistic for the bypothesis test?
NJ State Partol would like to know if the mean speed that drivers drive in I-80 is faster than I-280. They gather following sample information and ask students to investigate this matter using .05 s
The output Y of a binary communication channel is a unit-variance gaussian random variable with mean zero when the input is 0 and mean one when the input is 1. Assume that the input is 1 with probab
500 trials where each trial consists of tossing four coins and counting the number of heads. Find the number of cases in which exactly 3 heads turned up. Based on that result, what is the empirical
A university wants to know whether there is a difference in the proportions of female and male students in a two different classes. samples are colleceted from each class,
State the information given in the question in probability notation. What is the probability a traveller can get from A to B?
Horace Hadley has just programmed a superb OCR package called Read-right (pun unintended) that has an average error rate of 1 typo in every 500 characters. This is great by today's standards. A page
Consider a random sample of 100 dentists, and let x represent the mean number of units of local anesthetic used per week for the sample.
ABC News conducts an election day poll by randomly selecting voting precincts in New York, then interviewing all voters as they leave those precincts. a. Does this sampling plan result in a random s
A card is drawn from a standard deck of 52 playing cards. a.) Find the probability that the card is an ace or a king. b.) the card is an ace or a black card.
Find the probability of answering the 2 multiple choice questions correctly if random guesses are made. Assume the questions each have 5 choices for the answer. only 1 of the choices is correct.
The local county is considering a budget proposal that would reallocate funding to renovate the city pools. A survey is conducted to measure public opinion of the proposal.
It is claimed that in a bushel of peaches, less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the critical value for a = 0.025?
It is claimed that in a bushel of peaches, less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the alternate hypothesis for a one-sided
She calculates a power of 0.43 for that increased from a sample of 150 customers. Explain to her why she should consider a larger sample size.