Author: Anonymous

Which of the following is an accurate statement about the college premium?

Select the costs associated with the opportunity costs of attending university.

Specialization …

Do this question on your own paper.  You can type “see paper” in the box when finished.For each situation below, set up the hypotheses and identify the claim. Then indicate if the test is a left-tail, right-tail, or two-tail test. Also indicate if it will be a -test or a -test.a) A manufacturer claims that the mean lifetime of its light bulbs is 1000 hours. A homeowner selects 25 bulbs and finds the mean lifetime to be 980 hours with a standard deviation of 80 hours.b) A fast-food outlet claims that the mean waiting time in line is less than 3.4 minutes. A random sample of 60 customers has a mean of 3.3 minutes with a population standard deviation of 0.6 minutes.c) A local bakery claims that no more than 15% of their loaves of sourdough bread have an internal temperature below 200 degrees Fahrenheit when they leave the oven. A consumer advocacy group suspects that the actual proportion of under-baked loaves is higher than the bakery’s claim. To investigate, the group randomly sampled 120 loaves of sourdough bread and found that 24 of them had an internal temperature below 200 degrees Fahrenheit.

Use the following problem to answer the next two questions.The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days.  What is the probability of a pregnancy lasting less than 226 days?

The average height of flowering cherry trees in a certain nursery is 10.5 feet. If the heights are normally distributed with a standard deviation of 1.5 feet, find the probability that a tree is greater than 12.5 feet tall.

What is/are the critical value(s)?

Consider the following dataset: 19  20  21  25  26  27  30  30  31  32  32  34  35  38  38  41  55  62 Find the five-number summary for this dataset.  _[BLANK-1]_, _[BLANK-2]_, _[BLANK-3]_, _[BLANK-4]_, _[BLANK-5]_ Determine if there are any outliers.  If there are outliers, state them. Number of outliers: _[BLANK-6] outlier_ The outlier(s) is/are the data value(s) _[BLANK-7]_. Draw the box-and-whisker plot for the dataset.  Label the plot with the 5-number summary values.  Do this on your own paper.  

Find the mode for this group of employees.

Use this problem to answer the next four questions.The overall averages of 6 students in a large statistics class prior to taking the final exam are listed.45   50   50   63   79   103What is the mean for this group of employees?