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the scores in sta 205 test in the recent year follows aproximately N(505,110). How high must a student score in order to be in top 10% of all students taking the course.
Both objective and subjective criteria should be used to determine whether a process is in control. Do you agree or disagree?
Let X denote the waiting time until the tenth call arrives. What is the pdf of X? What are the moment generating function, mean , and variance of X?
An electrical firm that manufactures a certain type of lightbulb wants to estimate its mean life. Assuming that the life of the lightbulb is normally distributed and the standard deviation is known
Suppose a random sample of 600 credit card users is taken. What is the probability that more than 150 credit card users are very close to the total limit on their card(s)?
Analyze the above output to determine the multiple regression equation. What conclusions are possible using the result of the global usefulness test (F test)?
the probability that he gets an offer from company B is 0.6. If. on the other hand, he believes that the probability that he will get offers from both companies is 0.5, what is the probability that
Suppose that task A costs $800 for every week that it is in progress, and that task B costs $1,000 per week for every week that it is in progress, and that there is an additional charge of $400 for
How you judged the "representativeness" of the MEAN with respect to the original data and what was your "verdict?"
One grand prize of $600 and two consolation prizes of $100 each will be awarded. Jeremy purchases one ticket. Find his expected value.
Find the confidence interval of the true proportion of students to receive a 3.0 GPA. Please find the Z score, standard error, range, and your conclusion in a sentence.
Place the ball drawn from the first urn into the second and conversely with the ball from the second urn. let Xn denote the state of the system after the nth step.calculate its transition probabilit
Of the members of a bowling league, 11% are widowed. If 250 bowling league members are selected at random, find the probability that 19 or more will be widowed.
Out of the total nuts manufactured by a company 0.5 percent became defective. The nuts are supplied in packets of 40. Find out the probability number of packets containing No defective.
Write the null and alternative hypotheses. You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago.
Of 1200 people interviewed who had not attended a religious service at least once a month, 20 stopped to help a person with car trouble. At the 0.05 significance level, test the claim that the two p
Find a 95% confidence interval for the true mean annual income of the nursing school alumni. Write a statement about the confidence level and the interval you find
In a hypothesis test conducted at a level of significance of 1%, a P-value of 0.035 was obtained. Choose the best interpretation of the hypothesis test.
An auditor wants to estimate what proportion of a bankÂ's commercial loan files are incomplete. The auditor wants to be within 7% of the true proportion when using a 95% confidence level. How
Do you think would best represent the main aspects of the performance of your division? What types of graphical presentation (histogram, dot plot, stem-and-leaf, bar chart, etc.) would you include?
one of the 100 test subjects is selected at random. given that the person selected approves of the mayor, what is the probability that they vote democrat?
Use the Wilcoxin Rank Sum test for independent samples to determine if the median age of a car and a taxi are different.
A gumball machine has just been filled with 50 black, 150 white, 100 red and 100 yellow gum balls that have been thoroughly mixed. Sue and Jim, each, purchased one gumball. What is the likelihood bo
Determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
According to today's newspaper, they won yesterday. What is the probability the game was played at night?