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A recent study claimed that 15% of all eighth- grade students are overweight. In a sample of 80 students, 9 were found to be overweight. At a= 0.01, is there enough evidence to reject the claim using critical values?
When making the histogram from frequency table, (a) what goes along the bottom, (b) what goes along the left edge, and (c) what goes above each value?
Use the normal approximation to estimate the probability of at least one disaster in 25 missions.
Concept of statistical signi cance
The manufacturer would like to establish Inventory levels such that there is only a 5% chance of running out of stock. Where the Manufacturer should set the inventory levels?
Write a paragraph summarizing the results of the analysis and determine whether the calculated values of chi-square are statistically significant
A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..
Critically illustrate out the term standard deviation. Define mathematical averages. Why is the standard deviation less than the mathematical average?
A Starbucks manager decides to study waiting times of customers for service at the lunch time rush hour 1100-1200. He observes three customers to measure the time the customer enters the line to the time he or she reaches the counter.
Interpret coefficient on log (salesm). If salesm were to be increased by 20%, what would be estimated change in mktgp? Would this effect be substantive?
what statement should be made about the null and alternative hypothesis based on sample data and significance level?
Which of the following best explains how the F ratio examines differences among groups? A. The critical F is compared to the critical t.
Assume if random samples of size n = 9 are selected can we say anything about the distribution of sample means.
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