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Given a sample size of 34 with sample mean of 660.3 and stand dev of 104.9 we have the hypotheseis
Null is H0:u=700
Alt Hyp is Ja: u does not equal 700,
what is the the test statistic and at a 95% confidence level what is the critical value in this test?
A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years.
A director of a social agency is planning to hire temporaty staff to assist with intake. In making plans, the director needs to know whether there is any difference in the use of he agency at different seasons of the year.
in a group of 135 high school students 57 went to college. more precisely 30 of those who went to college were women
Calculate a 90% confidence interval for the percentage of homes in the US that had guns at the time of survey.
The heart rate in beats per minutes of 30 randomly selected students are given below: 78 64 69 75 80 63 70 72 72 68 77 71 74 84 70 62 67 71 69 58 74 70 80 80 63 88 60 68 69 70 71. Is it normal distribution or find the normal distribution.
Statistics means never having to say you"re certain." What defines the cohort? All patients from a particular healthcare plan?
Develop two-null hypothesis tests to ascertain if there are any statistical variances in the averages of bus route times and any statistical variance among the average performance of the bus drivers. Use the following information to conduct the te..
Processing an order for more disks cost $15. Zip uses 60000 disks annually, and the company has a 25% cost of capital. (a) Find the optimal order quantity.
A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime.
Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 27, 94 or 55 would not be permitted. How many different code groups can be designed?
Carryout the ANOVA and, if essential, post-hoc comparisons. Conduct a graph to represent group differences, and interpret ANOVA in a paragraph written in APA style.
Election officials take a random sample of 100 signatures and thoroughly investigate them to find that 84% are valid. Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
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