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1-A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of
their empathy for others. On a questionnaire designed to measure empathy, the mean score for the general population is 30.6.
Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of
6.6.
The appropriate statistical procedure for this example would be a
A- z-test
B-t-test
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
a factory produces 1400 beams a day which are on average 2.5 defective. find the probability out of 70 beams inspected
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
Connie's Apparel was one of Flashner's clients. Connie's Apparel made a profit last year. What is the probability that it was given an original rating of poor?
what makes the standard normal distribution different from other
Consider the experiment of rolling a pair of dice. Suppose that we are interested in the sum of the face values showing on the dice.
which one of the following statements is correct regarding the width of a confidence interval?select onea. if the
question a study is designed to investigate whether there is a difference in response to various treatments in patients
the probability is 33 that a message sent over a communication channel is garbled. if the message is sent repeatedly
question part points submissions used in a national survey of 2039 adults 1550 responded that lack of respect and
a study of college freshmens study habits found that the time in hours that college freshmen use to study each week is
a regional track championship has decided that they will invite the fastest 15 of runners in their region runners with
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