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A professor took a sample of 194 students from her morning class and 131 in the evening class. On the 1st exam, all those sampled from the morning class got 64 while those sampled from the evening averaged to 71 with a variance of 179. If the two samples were combined
1. What is the combined exam 1 average ? (66.8215?)
2. What is the combined median for exam 1?
3. what is the shape of the combined exam 1 grade distribution?
4. What is the combined exam 1 Standard deviation?
The Starbucks in the Bauer College of Business found that 24% of customers purchase more than one cup of coffee per day from their shop. If 180 customers are randomly selected one day, what is the probability that no less than 25% of them purchase..
Calculate and post your 'answers' or interpretations of (a little bit of a review of the fundamental concepts): The three Measures of Center (Mean, Median, and Mode).
Check that the formula (1) holds when X Unif(0, b). Formula (1) also works for b = 1. Check this when X is an Exponential RV with PDF f(x) = e-x for x 0.
The calculated p-value for a hypothesis test is 0.084. What decision about the null hypothesis would occur in the following: The hypotheis test is completed at the 0.05 level of significance.
Antidepressant is normally distributed with a mean of 6 lbs and a standard deviation of 3 lbs. What is the probability of weight gain? What is the probability of gaining between 0 and 12 lbs?
Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer and Catanese (2003) examined the importance of food as a source of pleasure versus concerns ab..
Create a bar chart with an appropriate vertical axis, horizontal axis, and title - what your final chart should look like, although your titles and numbers will be different. Remove my example and insert your own.
if a random variable x has the uniform 01 distribution and y2x-1. find pyley for all such values y by reexpressing the
The smallest quantity in a cell is minus 35, but two different cells with minus signs have 35 units in them. What problem will this cause and how should this difficulty be resolved?
womens weights are normally distributed with a mean of 143 lb and a standard deviation of 29 lb and mens weights are
Comparing Data Sets Using the systolic blood pressure levels and the elbow breadths of women, as listed in Data Set 1, analyze each of the two data sets and determine whether each appears to come from a normally distributed population
question a sample of 17 states has the cigarette taxes in cents listed112 120 98 55
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