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The purpose of the study was to compare the mean salivary flow rate among subjects with cerebral palsy and among
The purpose of the study was to compare the mean salivary flow rate among subjects with cerebral palsy and among subjects in a control group. Each group had 10 subjects.
The following table gives the mean flow rate in ml/minute as Well as the standard error of the estimate of the mean. Here are some descriptive statistics of the salivary flow rate for each group.
(a) Below we have comparative boxplots and overlayed normal probability plots for the salivary flow rate. Is it reasonable to assume that the populations are normal?
Is it reasonable to assume that the population variances are equal? (Discuss)
(b) Do we have significant evidence at a = 5% that the mean salivary flow rate are different between these groups?
(c) Give a 95% confidence interval for the difference in mean salivary flow between these two group.
Let A be the event that the first casting selected is from the local supplier, and let B denote the event that the second casting is selected from the local supplier. Determine: P (A ∩ B)
Using the probabilities above what is the expected size of family you draw?
Given are the numbers of times the machine was used over each of the last 30 days. Find out the mean number of times the machine was used per day.
The cutoff (or cutoffs), and the score of the sample on this distribution. Then explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
Determine the probability that sample mean will be greater than M=510. In symbols, what is p(M>510)? Determine the probability that sample mean will be greater than M=520.
Consider the problem of finding a shortest (forward) path in a graph with given arc lengths, subject to the constraint that the path passes through every node exactly once (the choice of start and end nodes of the path is subject to optimization).
Delphi Leasing Company leases a new machine that has a cost and fair value of $225,000 to Lindy Corporation on a 5-year noncancelable contract.
a statistician determines the amount of daily pocket money to give to his son by flipping 5 quarters and giving the
suppose that the correlation r between two quantitative variables was found to be r 0. this means thatthere is a
What is the probability the company will win at least one contract and What is the probability that no fruit trees and 2 of each of the others will be selected? 23)
someone working for a survey organization approached thefirst 100 students they saw on campus and noted that 52 of
State a hypothesis.
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