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The registrar of a large university knows that 30% of the students come to college with credit for an advance placement (AP) course. The registrar is going to conduct interviews with students regarding their experiences at the university. Depending on which students are chosen, the proportion of students in the sample that have AP credit may vary.
In a sample of 100 students, what is the probability that over 38% of the sample has AP credit?
In a sample of 200 students, what is the probability that over 31% of the sample has AP credit?
Mars, Inc. claims that 24% of its M&M plain candies are blue. A sample of 100 M&Ms is randomly selected. Find the mean and standard deviations for the number of blue M&Ms in such a group of randomly selected 100 candies.
Suppose the returns of a particular group of mutual funds are normally distributed with a mean of 12.4 and a standard deviation of 4.7%. I f the manager of a particular fund wants his fund to be in the top 5% of funds with the highest return, what re..
Variation exists in virtually all parts of our lives. We often see variation in results in what we spend (utility costs each month, food costs, business supplies, etc.). Consider the measures and data you use (in either your personal or job activitie..
Way around B&W plots
The manufacturer of beer kegs claims that 95% of the kegs they produce do not leak after 5 years of use. A bar owner tests the manufacturers claim at the 0.05 significance level. She takes a sample of 200 kegs and finds 185 do not leak. Wha..
measures of central tendency and dispersion with spssthe statistics for this week become the basis for several other
Research question - Is there a positive correlation between the amounts of profits (Dependent Variable) and total sales (Independent Variable) based on the costs of the process of production and distribution?
Why would it be wrong to use the proportion 0.28 as the proportion of all elements of statistics students who are male?
Which of the following statements about the correlation coefficient between variable X1 (Number of advertisements placed the previous week) and variable X2 (Number of calls received the previous week) is correct:
Convariance matrix
Develop a model for the Total Cost to put on the seminar. Let x represent the number of students who enroll in the seminar - develop a model for the Total Profit if x students enroll in the seminar.
a. Express the orginal claim in symbolic form. b. Identify the null and alternative hypothesis
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