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Consider a sample of 148 small businesses. During a three-year period, 15 of 106 headed by men and 7 of the 42 headed by women failed. Let p1 be the proportion of businesses headed by women that failed. Let p2 be the proportion of businesses headed by men that failed. Find the test statistic for a significance test to see if this is evidence the the proportion of businesses failed is higher for women than for men.
if mouse weights are normally distributed with a mean weight of 23 and SD of 4. With 10 mice per box, what weight should they use so that no more than 8% of the boxes will have an average mouse weight below that weight?
A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches.
For the daily lottery game in Illinois, participants select three numbers between 0 and 9. A number cannot be selected more than once, so a winning ticket could be, say, 307 but not 337. Purchasing one ticket allows you to select one set of num..
Consider Mary's study of whether the learning of 6th graders on a math lesson is affected by background noise level. Describe the pros and cons of Mary using a repeated measures design for this study. What would you probably choose to do? Suppo..
what is the significance of hypothesis in research? what are type i and ii errors inhypothesis
Identify the type of study proposed and indicate its specific strengths and weaknesses
Complete the analysis of variance. At a .05 level of significance, is there a significant difference between the treatments?
Accepting Manipulation or Manipulating
starbucks coffee co. uses a data-based approach to improving the quality and customer satisfaction of its products.
Describe the direction of the relationship between the Hamstring strength index 60°/s and the Shuttle run test and without using numbers, describe the relationship between the Hamstring strength index 120°/s and the Triple hop index.
What is the correlation coefficient and do the data provide sufficient evidence to conclude that the number of years of study and test score are linearly positively correlated? Use α = 0.01
Using the information from part by hand, calculate a 90 confidence interval for the difference of the means for the two time periods.
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