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The world's smallest mammal is the bumblebee bat. The mean weight of 15 randomly selected bumblee bats is 1.659 grams, with a standard deviation of 0.264 grams.
Dr. Clifford Jones claims that the mean weight of bumblebee bats is 1.8 grams. We are interested in whether it's less than he claims. Using the t-distribution technique, answer the following questions.
Assuming that Dr. Clifford is correct, estimate the probability of a sample of 15 bumblebee bats producing an average as low as the one from our sample (one-sided p-value):
1.The degrees of freedom are df =______.
2.The test-statistic t = (positive version of t, three places after decimal) =______.
3.The p-value is between______(smaller) and ______ (larger, exact answers).
The company must also purchase connectors from two other suppliers, 20% from B and the rest from C. The rates of defective connectors from B and C are 2% and 4% respectively. You buy one and find that it is defective. What is the probability that it ..
The mean annual income of certified welders is normally distributed with a mean of $50,000 and a population standard deviation of $2,000. The ship building association wishes to find out whether their welders earn more or less than $50,000 annually. ..
1) There are 2 types of graphs that are best to use when graphing two scale variables. Which 2 graphs are these? 2) When graphing a nominal independent variable and a scale dependent variable, you could use a ____________ or a ____________.
What are other analytics that could be done for this client that would add insight - What was the most important attribute the client should take away from this analysis and why
Develop a scatter diagram for these data. Try to approximate the relationship between x and y by drawing a straight line through the data.
Why do we care whether the assumptions required for statistical tests are met?
Prepare a report (see below) with your ranking of the judges based on the probabilities and conditional probabilities as well as the analysis of each court. Include the following seven (7) items in table format to support your ranking. Be sure to use..
You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Because there is relatively little known about the drug, you plan to use a nondirectional alternative hypothesis. Since your resources are l..
The owner of a single-family home would like to develop a model to predict electricity consumption in his house, based on average atmospheric temperature in degrees Fahrenheit.
4x5 contingency table was developed and computed to 15.42. At the 0.05% level, the critical value is21.026
What is probability that Tim gets exactly 12 emails on a particular day?
What is the standard error of this difference between the two means?
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