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1. Given an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations taken at random from this population exceeds 78 is?
2. A producer of a juice drink advertises that it contains 10% real fruite juices. A sample fo 75 bottles of the drink is analyzed and the percent of real fruit juices is found to be 6.5%. if the true proportion is actually 0.10, what is the probability that the sample percent will be 6.5% or less?
11% of all books sold are romance genre. If the bookstore sells 316 books on a given day, what is the probability that fewer than 40 are romances, at least 25 are romances, between 25 and 40 are romances?
Give a mathematical expression for the probability density function of driving distance.
A bonding company want to insure a construction projects completion. If the project is cancelled due to the contractor's lack of performance
The relationship between energy consumption and average car gas mileage, controlling for GDP.
Find the probability that he will answer at least 3 questions correctly.
Is there a method which is accepted across industries for determining the minimum size of valid sample? N>50 +(8m aka 8 times the number of independent variables)
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
A population of scores forms a normal distribution with a mean of μ = 40 and a standard deviation of σ =12.
Using a significance level of 0.05, perform a hypothesis test to see if the workers are right, and you need to hire more help. Write your hypotheses, calculate your test statistic and decide whether or not to reject your null.
Hypothesis test for dependent samples and Has satisfaction with MHMR services changed since the January survey
Suppose your instructor randomly surveyed his or her performance (i.e., students "graded" the teacher) over many years (assume an 'infinite' population). The frequency of ratings were as follows:
Do the data from this sample provide evidence for a significant increase in REM activity during exams? Use a one-tailed test with _ = .01. B.) Compute Cohen's d to estimate the size of the effect.
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