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Question: Gift of the Gauche, a left-handedness information Web site (www.left-handedness.info), provides information concerning left-handed activities, products, and demography. It indicates that about 10% to 11% of the population of Europe and North America is left handed. It also reports on demographic surveys. It cites an American study in which more than one million magazine respondents found that 12.6% of the male respondents were left-handed, as were 9.9% of the female respondents, although this was not a random sample. The data obtained by a British survey of more than 8,000 randomly selected men and women, published in The Graphologist, is furnished in a file titled Lefties. Based on this data, determine if the "handedness" of an individual is independent of gender. Use a significance level of 0.01 and a p-value approach.
1. in a hospitals shipment of 3500 insulin syringes 14 were unusable due to defects. is this sufficient evidence to
a) Test appropriate hypotheses nd state your conclusion b) The boxplots of the two distributions show an outlier among the data north of Derby. What effect might that have had on your test?
The first three digits of a university telphone exchange are 452. if all the sequences of the remaining four digits are equally likely, what is the probability that a randomly selected universtiy phone number contains seven distinct digits?
a manufacturer of microwave ovens is trying to determine the length of warranty period it should attach to its
At the .05 significance level, can we conclude that the guideline is still reasonable?
we receive a shipment of 200 units of which 18 are defective. we test 10 units at random and we model the number k of
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
according to the mampm company each package of plain mampms should contain 24 blue 14 brown 16 green 20 orange 13 red
Identify the relevant population and sampling frame, and indicate an appropriate sampling method for the situations below: (a) The Human Resources Department wish to determine whether single parent employees have a higher rate of absenteeism than m..
What critical value should the company officials use to determine the rejection region?
In a class of 40, 16 driver a car made outside the United States. What is the confidence interval for the total population of students at the 95% level?
Problem 1: A supplier shipped a lot of six parts to a company. The lot contained three defectiveparts. Suppose the customer decided to randomly select two parts and test them fordefects. How large a sample space is the customer potentially working..
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