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Which of the following accurately describes the proportions in the tail of a normal distribution?
a. Proportions in the right hand tail are positive and proportions in the left hand tail are negative
b. Proportions in the right hand tail are negative, and proportions in the left hand tail are positive
c. Porportions in both tails are positive
d. Proportions in both tails are negative
suppose a bar buys 10 of these sony tvs what is the probability that the average life time of the bar's tv is less than 19,650 hours.
Testing for population proportion - evidence that the proportion of data processing clerks who have gone through the new training and are no longer employed is less than .25?
The adult books 20 are nonfiction and of the children's books 103 are nonfiction.if a book is selected at random, find the probability that it will be fiction.
Assume that the underlying population variances are equal. a. Are the two samples paired or independent?
the density function of the time z in minutes between calls to an electrical supply store is given byfz 110e-z
Determine margin of error was used in creating confidence interval above? Determine the sample size required to obtain the margin of error of 10.97 with 90% confidence interval?
1.as the degrees of freedom become larger the difference between the t and z distributions becomesa.narrowerb.stays the
the fracture strength of tempered glass averages 14 measured in thousands of pounds per square inch and has standard
in my class of 20 students 7 are juniors 11 are seniors and 9 are senior biology majors.a. what is the probability of
The results of a district spelling bee for both girls and boys are normally distributed. the 60 girls have a mean score of 71 with a standard deviation of 6, while the 50 boys have a mean score of 66 points with standard deviation of 5 points.
question 1you are an inspector carrying federal epa credentials.nbsp you have been asked to conduct an unannounced
What can you say with 95% confidence about the percent of all American adults who think that humans developed from earlier species of animals.
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