To determine if this was true,
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A manufacturer of carpet wanted to reduce the number of flaws per square yard of carpet. Data gathered from quality control measures indicated that Brand A typically had 2.5 flaws per square yard. A mechanical engineer for the company developed a modification of the current process that she thought might reduce the number of flaws. To determine if this was true, one of the machines in the plant was modified according to her specifications. A sample of 30 square yards of carpet was analyzed for flaws. The sample yielded a
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- One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within 10.005 inch of the length specified by the automobile company. Data are collected from a sample of 50 steel parts and are shown in the following table. The measurement reported is the difference in inches between the actual length of the steel part, as measured by a laser measurement device, and the specified length of the steel part. For example, the first value, -0.003, represents a steel part that is 0.003 inch shorter than the specified length. Complete parts a through c Click the icon to view the data table. a. Construct a frequency distribution Difference in Length -0.005 but less than -0.003: -0.003but less than -0.001 -0.001but less than 0.001 0.001but less than 0.003 0.003but less than 0.005 Frequency Difference Between Actual and Specified Lengths 0.002 0 -0.003…In a study at The Ohio State University, 16 student volunteers drank a randomly assigned number of cans of beer. Thirty minutes later, a police officer measured their blood alcohol content (BAC) in grams of alcohol per deciliter of blood. Throughout the United States, the legal BAC limit is 0.08. The students were equally divided between men and women and differed in weight and usual drinking habits. Because of this variation, many students do not believe that the number of ingested drinks predicts BAC well.The data in the given figure consists of: a.2 unpaired sets of values, each of which has 16 values b.32 ordered pairs of values c.16 ordered pairs of valuesFrom a random sample of 1000 Americans, it was discovered that 920 of them lived in neighborhoods with acceptable levels of Carbon Monoxide. (Source: The Environmental Protection Agency) Obtain a point estimate for the proportion of Americas who live in neighborhoods with acceptable levels of carbon monoxide.
- your car is more crowded than you think. table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.To investigate water quality, the Columbus Dispatch took water specimens at 16 Ohio State Park swimming areas in central Ohio. Those specimens were taken to laboratories and tested for E. coli, which are bacteria that can cause serious gastrointestinal problems. For reference, if a 100-milliliter specimen (about 3.3 ounces) of water contains more than 130 E. coli bacteria, it is considered unsafe. The E. coli levels per 100 milliliters found by the laboratories are presented in the table: 291.0 10.9 47.0 86.0 44.0 18.9 1.0 50.0 190.4 45.7 28.5 18.9 16.0 34.0 8.6 9.6 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV CrunchIt! Find the mean E. coli level. Mean E.coli level (rounded to two decimal places) per 100 mlOne study investigated whether the thickness of the banana peel is related to the banana variety and the fertilizer used. The research examined 4 different banana varieties and 3 different fertilizers.The following values were calculated from the data:SSr = 3.4 SSc =1.3 SSe =1.2The research first set out to find out if there is a difference in the average thickness of the banana peel between the fertilizers used. The used fertilizers are presented in the material with columns.Calculate the p-value of the test. Give the answer to two decimal places. Remember the correct decimal separator.
- your car is more crowded than you think. table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. show that the average number of riders in the car of a typical commuter is 1.9.A researcher wonders whether younger mothers have babies that are significantly heavier or lighter than the population average of μ 7.25 pounds. The researcher collects data from N = 35 babies who were born to mothers between the ages of 16 and 18. The average weight for these babies was M = 7.15 pounds (SD = .6 pounds).
