Mathematics, 09.03.2021 20:40 cowikta
The distribution of time spent brushing teeth for the 1,200 students in a school is multimodal with a mean of 43 seconds and a standard deviation of 8.99 seconds. If a random sample of 9 students is selected, is it appropriate to calculate the probability of the sample mean being less than 30 seconds using an approximately Normal model? Yes, the population of 1,200 students is reasonably large in size, so the shape of the population is not a concern. Yes, the sample of 1,200 students is a reasonably large sample size, so the shape of the population is not a concern. No, it is not appropriate to estimate the probability using an approximately Normal model because the population is not Normal, and the sample size is small. No, it is not appropriate to estimate the probability using an approximately Normal model because the population is not Normal, but the sample size is reasonably large.
Answers: 3
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Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?
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Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?
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Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants.assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1
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The distribution of time spent brushing teeth for the 1,200 students in a school is multimodal with...
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