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What is the sample space for counting the number of females in a group of n people?
Explain why stepwise regression is necessary when there are many predictor variables. Explain the main difference between simple linear regression and multiple linear regression.
The final score of games of a certain spot were compared against the final point spreads established by oddsmakers. The difference between the game outcome and point spread (called a point spread er
Of 25 members of a senior honors engineering society, 18 are men and 7 are women. The advisor chooses 4 of them to be on the executive committee. What is the probability that exactly 2 of the member
Analyze and discuss how organizational attitudes and ethics can play a role in your success or failure.
The Jessie Cohen Clothing Group owns factories in three towns (W, Y and Z) which distribute to three Cohen retail dress shops (in A, B, and C). Factory availabilities, projected store demands, and u
The shape of the distribution of the time required to get an oil change at a 10-minute oil change facility is unknown. However, records indicate that the mean time is 11.5 minutes, and the standard
The number of traffic accidents that occur on a particular stretch of road during a month has a distribution with mean of 7.7. Find the probability that fewer than three accidents will occur next mo
The number of hours per day a college student spends on homework has a mean of 6 hours and a standard deviation of 1.25 hours. Yesterday she spent 3 hours on homework. How many standard deviations f
During each day, the probability that your computer's operating system crashes at least once is 5%, independent of every other day. You are interested in the probability of at least 45 crash-free da
Describe how to design an experiment to study these questions.
The mean square error from the ANOVA is determined to be 24.4 The sample means was X1=3.1,x2 = 10.5, and x3 = 19.6, with a n1=n2=n3=3. Use Tukey's test to determine which pairwisemeans are signific
Give an example of a survey that is poorly designed because it contains one or more of the following kinds of bias. And then, indicate how the survey could be corrected:
In a two-tailed hypothesis test, the test statistic is determined to be z = -2.5. The p-value for this test: Why?
The manager of Sandy Corporation wants to determine whether or not the type of work schedule for her employees has any effect on their productivity. She has selected 15 production employees at rando
A certain species of fish has a weight which is normally distributed, with mean u = 2kg and standard deviation 0.3 kg. The boat can hold a maximum weight of 500 kg of fish, what is the maximum numbe
A major brokerage company has an office in Miami, Florida. The manager of the office is evaluated based on the number of new clients generated each quarter. The following data reflect the number of
Bara Research Group conducted a survey about church attendance. The survey respondents were asked about their church attendance and asked to indicate their age. Use the sample data to determine whet
As a responsible statician (someone who practices statistics) you feel a need to tell him what he is doing wrong. Explain three things that he is doing wrong ( or that break some statistcal requirem
A clinic employs nine physicians. Five of the physicians are female. Four patients arrive at once. Assuming the doctors are assigned randomly to patients, what is the probability that all of the ass
If the probability that Event A occurs is 0.4, that Event B occurs is 0.6, that Event C occurs is 0.5, that both Event A and Event B occurs is 0.3, that both Event B and Event C occurs is 0.2, and E
Next year the chain will complete the process of opening western stat franchises. In how many ways can it designate the 16 western states in which to hold off openins until next year
You are dealt a hand of three cards, one at a time. Find the probability your cards are all red (all diamonds or hearts).
A certain company believes 95% of job applicants are trustworthy. The company gives everyone a polygraph test asking, "Have you ever stolen anything from your work place?" Naturally, all applicants
A corporation has 11 manufacturing plants. Of these, 7 are domestic and 4 are located outside the United States. Each year a performance evaluation is conducted for 4 randomly selected plants. What