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A company manufactuirng compter chip finds that 8% of all chips manufactured are defective. Management is concerned that high employee turnover is partially responsible for the high defect rate. In an effort to decrease the percentage of defective chips, management decides to provide additional training to those employees hired within the last year. After training was implemented, a sample of 450 chips revealed on 27 defective. Was the additional training effective in lowering the defect rate?
A) Write the null and alternative hypotheses
B) What is the value of the test statistic
C) What is the associated P value
D) State your concluson using ? = 0.01
What is the probability that a consumer selected at random: a. purchased fewer products than before? b. purchased the same number of products as before?
When you are setting up a hypothesis test based on some claim, why is it absolutely necessary that the level of significance, alpha, be set early and upfront before any calculations are made? What are the serious mistakes that are made
The data given shows daily sales at the petrol station. Compute Karl Pearson's co -efficient of skewness. Quantity sold (in litres) and No. of days. are given.
A) Determine the probability that at least 4 of the 155 golfers would get a hole in one on the sixth hole. Discuss
the lifetimes of light bulbs of a particular type are normally distributed with a mean of 280 hours and a standard
Which of the following is most likely a parameter as opposed to a statistic? The average score of the first five students completing an assignment
During the early stages of production for a single-cylinder engine designed for use in portable gen- erators, the manufacturer randomly selects 12 engines from the end of the assembly line and subjects them to a battery of tests.
question 1 a recent national survey asked adults if they thought the government should continue to fund nasas efforts
the local county is considering a budget proposal that would reallocate funding to renovate the city pools. a survey is
A party, and 35% stay home. Seventeen people are randomly selected. Can the probability that exactly 4 of them stay home be computed using a binomial model?
q1. let wi be the power received by the mobile at distance i from the base station. the probability distribution of the
two students are playing chess to see if they are equal in ability. the rules are that seven games will be played not
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