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Question: United Manufacturing and Supply makes sprinkler valves for use in residential sprinkler systems. United supplies these valves to major companies such as Rain Bird and Nelson, who in turn sell sprinkler products to retailers. United recently entered into a contract to supply 40,000 sprinkler valves. The contract called for at least 97% of the valves to be free of defects. Before shipping the valves, United managers tested 200 randomly selected valves and found 190 defect-free valves in the sample. The managers wish to know the probability of finding 190 or fewer defect-free valves if in fact the population of 40,000 valves is 97% defectfree. Discuss how they could use this information to determine whether to ship the valves to the customer.
suppose that prior to conducting a coin-flipping experiment we suspect that the coin is fair. how many times would we
Construct a 90% confidence interval for the population proportion of students who believe the mascot should be changed.
Estimate a test statistic for null hypothesis H0: μ = 30 against two-sided alternative hypothesis H1 : μ ≠ 30, and by plotting this on its reference distribution.
1. for each equation below identify what type of equation it is linear or exponential which variable is the independent
estimating the sample standard deviation using normal score.for a sample with a mean of m 85 a score of x 90
What is the number of replications for each of the main treatment factors and their interaction and what do you conclude from the overall ANOVA analysis
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
A state representative is reported as saying that about 10% of reported auto thefts involve owners whose cars have not really been stolen, but who are trying to defraud their insurance company.
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
Is there a statistically significant relationship between gender and party preference?- Compute column percentages for the table to clarify the pattern of the relationship.
question a study reported in the journal of the american medical association investigated the cardiac demands of heavy
Suppose that in a regression analysis, the explanatory variable represents temperature, and the explanatory variable represents whether or not an individual is a male or female. Which statement is the most accurate given this information?
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