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The article "Compatibility of Outer and Fusible Interlining Fabrics in Tailored Garments (Textile Res. J., 1997: 137-142) gave the following observations on bending rigidity (µN . m) for medium-quality fabric specimens, from which the accompanying Minitab output was obtained:
Would you use a one-sample t confidence interval to estimate true average bending rigidity? Explain your reasoning.
a sample of 50 days showed that a fast food restuarant served an average of 182 customers during lunchtime. the sample
a random sample of students was weighed after their first week of their first semester and weighed again after their
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
Many retail stores offer their own credit cards. At the time of the credit application the customer is given a 10 percent discount on the purchase.
A company that assembles electronic alarm systems requires three component parts: C1, C2, and C3. In-house production costs are estimated to be $15 per unit for part C1, $18 per unit for part C2, and $ 20 per unit for part C3.
wayne collier designed an experiment to measure the fuel efficiency of his family cat under different tire pressures.
(a) Draw a boxplot of these data. Do you think a normality assumption is reasonable? (b) Calculate a 95% confidence interval for the mean payback period for this sort of retro-fitted double glazing. (c) How large a sample would be needed to estimate ..
ample of fifteen 8 ounce Baby Ruth candy bars are weighed and it is found sample standard deviation is 0.6 ounces. Test company's claim at (alpha sign) is 0.05.
You have 4 jars. In the largest jar you have three balls numbered 1 to 3. Then you have 3 colored jars. Jar 1 has a red ball and two orange balls.
The Republican party is interested in studying the number of Republicans that might vote in a particular Congressional district. Assume that the number of voters is binomially distributed by party affiliation (either Republican or not Republican).
What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?
Identify the population and the sample. A survey of 1015 U.S. adults found that 32% have had to put off medical care for themselves or their family in the past year due to the cost.
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