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Suppose one makes n independent trials of an experiment whose probability of success at each trial is p. Show that the conditional probability that any given trial will result in a success, given that there are k successes in the n trials, is equal to k/n.
Suppose the download times for a commercial tax preparation site are normally distributed with a mean download time of 2.0 seconds and a standard deviation of 0.5 second.
Find the mean, median, and mode(s) of the observations in problem 2.- Find the lower, middle, and upper quartiles of this data set. Also find the 10th, 15th, and 65th percentiles. What is the interquartile range?
An ANOVA was run and the results are shown below. At the .01 significance level, is there a difference in the weight loss between the three plans? What is the p-value? What can you do to determine exactly where the difference is?
Indicate which of the following choices best identifies the hypothesis test. A. Independent group means, population standard deviations and/or variances known
we estimate the mean price of a cell phone in the bay area using a 95 level of confidence. from a random sample of 25
Discuss the difference between sampling bias and measurement bias. Give exam, ples of statistical studies in which each is an important consideration.
interstate 90 is the longest of the east-west u.s. interstate highways with its 3112 miles stretching from boston ma at
Salary data for a sample of 50 universities were obtained. We are curious about the relationship between mean salaries for assistant professors.
Develop a 95% confidence interval for the proportion of the population of adults who feel customer service is better today than it was 2 years ago.
the manager of a computer software company wishes to study the number of hours junior executives by type of industry
What is our decision regarding the differences between the observed and expected frequencies if the critical value of chi-square is 9.488 and the computed value is 6.079?
Social support and stroke-induced aphasia. Hilari and Northcott (2006) used a Social Support Survey (SSS) to gauge how well supported individuals suffering.
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