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Given linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation.
A stock analyst claims to have set up a mathematical technique for selecting high-quality mutual funds and promises that a client's portfolio will have a higher average 10 year annualized returns an
Calculate the test statistic used to test the null hypothesis that p1 = p2. In the vote on the Clean Water bill, 53% of the 205 Democrats voted for the bill while 51% of the 230 Republicans voted for
A random sample of 100 students at the high school was asked whether they would ask their father or mother for help with a homework assignment in science. A second sample of 100 different students w
A state auto-inspection station has two inspection teams. Team 1 is lenient as well as passes all automobiles of current vintage; team 2 rejects all autos on first inspection because their "headligh
If random sample of 25 specimens is chosen, determine the probability that the sample average sediment density is at most 3.00? Between 2.64 and 3.00?
Determine the probability that it takes at most 1 hour of machining time to produce randomly selected component? (Round your answer to four decimal places.)
Given that the pair of jeans is bought for over $100, what is the probability that they are brand A? show your work.
For which of the following approaches to multiple regression analysis is the variable that best predicts the criterion (dependent) variable always entered first into the regression equation:
The sample had a mean of 18.8 minutes and a standard deviation of 9.2 minutes. Does admissions office have sufficient evidence to reject the students' claim? Use ? = 0.01. Determine the p-value. (Gi
There are 4000 mangoes in shipment. It is found that it has mean weight of 15 ounces with standard deviation of 2 ounces. A quality inspector randomly chosen 100 mangoes from the shipment. Determin
A researcher would like to evaluate the relationship between a person's age and their preference between to leading cola brands.
A survey for brand recognition is done and it is determined that 68% of consumers have heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For such groups
Employ and addition rule to find the probability the company will not lose money next quarter. Employ the complement rule to find the probability it will not lose money next quarter.
A random sample of 35 of the 900 contractors is asked to complete satisfaction survey. The satisfaction scores for 35 participants are averaged to produce mean satisfaction score. Determine the pop
A study of cats and dogs found that 39 of 60 cats and 21 of 50 dogs slept more than 10 hours per day. At the 0.05 level of significance, is there sufficient evidence to Conclude that a difference ex
Determine the probability that randomly selected mango weighs less than 14 ounces? A quaility inspector randomly selected 100 mangoes from shipment.
A computer task takes anywhere from 1 to 5 seconds to complete. Let X be completion time for task and suppose that X has a uniform distribution over the interval [1,5] seconds. Determine the probabi
A sample of 35 observations is chosen from normal population. The sample mean is 28, and the population standard deviation is 6. Conduct the following test of hypothesis using the .05 significance l
Over many years of experience, it has been established that the students who score 900 and above in certain qualifying examination receive a scholarship, provided that no more than 5% of students si
Compute the incidence of stroke in persons over 75 years of age. Compute the relative risk of stroke comparing hypertensive to non-hypertensive persons
Determine the total serum cholesterol for a 50-year old person. Total sum cholesterol= Y=143.4=1.134x
An investigator wants to assess association between caffeine consumption and impaired glucose tolerance, a precursor to diabetes. A study planned to include seventy participants.
The gestation period for the human births can be taken as normally distributed with a mean of 266 days and a standard deviation of 16 days. In a gestation period of 276 days, what percentile among h
Determine the 93rd percentile of the long term government bond's price? Determine the median of the long term government bond's price?