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The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information:
What percentage of people received a grade of 94 or less?
Suppose 37% of a company's computer keyboards are manufactured in Los Angeles, and 63% in Detroit. Suppose 2% of the keyboards made in Los Angeles.
(1) How very over-conservative the log correlation algorithm is, and (2) How variable the aligns algorithm is in fitting a Gaussian to the correlation function.
Frequency Distribution and Graphic Presentations - On a separate graph draw and label the Cumulative Frequency Polygon.
Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour.
Based on a random sample of 2,500 people, the estimates of people by age group unemployed in one Northern city are found in the table. Is the study descriptive or inferential?
describe what a type i error would mean in the context of this problem.select onea. reject h0 when the mean score has
What sample size is needed so that the margin of error of your estimate is not larger than 1 hour for 95% confidence
suppose you want to test the claim that mu!=3.5 with standard deviation unknown. Given a sample size of n = 40 and a level of significance of alpha=.05, when should you reject H0.
Construct the 90?% confidence interval estimate of the mean wake time for a population with the treatment.
The cycle graph on n nodes, denoted Cn, is a graph in which all n nodes are connected in a closed chain.
Is this enough information to determine whether male smokers or female smokers are more likely to contract the disease? If so, make that determination. If not, explain what additional information would be needed to make that determination.
a. The reported coefficient of multiple determination was .834. Interpret this value, and carry out a test of model utility.
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