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Twenty years ago, entering male high school students of Central High could do an average of 24 pushups in 60 seconds. To see whether this remains true today, a random sample of 36 freshmen was chosen. If their sample mean was 22.5 with a sample standard deviation of 3.1, can we conclude that the mean is no longer equal to 24? Use the 5 percent level of significance.
LO.1 (Activity analysis) The Raleigh plant manager of Allentown Corp. has noticed the plant frequently changes the schedule on its production line. He has gathered the following in
In marketing research field surveys are commonly used to collect primary data from the respondents. 1. Through Personal Interviews: The investigator follows a rigid proced
In a suburban community, 30% of the households use Brand A toothpaste, 27% use Brand B, 25% use Brand C, and 18% use Brand D. In the four groups of households, the proportions of r
Generate 1000 samples for each of the following continuous random variables: (a). Exponential distribution with λ = 1.2 and λ = 2.1 (b). Normal distribution with μ = 3.1, σ
1. Mention the characteristics of Statistics. Explain any two applications of Statistics.
Data was gathered on a group of ninth grade students. Some students have been diagnosed with a learning disability. All students were measured on conduct, attention, hyperactivity
Why are Jupiter’s Galilean moons geologically active? - Io is the most Volcanically active world in our solar system, Io get the heat from a process that happens on its interior
The following data shows marks obtained by 40 students in a Statistics test. 75 99 72 54 25 40 65 32 69 10 85 48 52 80 63 64 35 62 51 71 67 57 95 74 56 69 61 49 45 63 39
What is a purchase return? A buy purchase return occurs when a buyer profits products that it has bought from a provider. Under the regular inventory system, the cost of the
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