Data set X consists of the weights of 40 fruits and has a mean weight of 120 grams. Data set Y consists of the weights of 80 fruits and has a mean weight of 200 grams. Data set Z consists of the weights of the 120 fruits from data sets X and Y. What is the mean, rounded to the nearest gram, of data set Z?
Question
Data set X consists of the weights of 40 fruits and has a mean weight of 120 grams. Data set Y consists of the weights of 80 fruits and has a mean weight of 200 grams. Data set Z consists of the weights of the 120 fruits from data sets X and Y. What is the mean, rounded to the nearest gram, of data set Z?
Solution
Para encontrar la media del conjunto de datos Z, que consiste en los pesos combinados de los conjuntos de datos X e Y, podemos seguir estos pasos:
- Calcular la suma total de los pesos en el conjunto de datos X.
- Calcular la suma total de los pesos en el conjunto de datos Y.
- Sumar las dos sumas obtenidas en los pasos anteriores para obtener la suma total de los pesos en el conjunto de datos Z.
- Dividir la suma total de los pesos en el conjunto de datos Z por el número total de frutas en el conjunto de datos Z para obtener la media.
Paso 1: Calcular la suma total de los pesos en el conjunto de datos X. La media del conjunto de datos X es 120 gramos y hay 40 frutas. Suma total de los pesos en X = 120 gramos * 40 frutas = 4800 gramos.
Paso 2: Calcular la suma total de los pesos en el conjunto de datos Y. La media del conjunto de datos Y es 200 gramos y hay 80 frutas. Suma total de los pesos en Y = 200 gramos * 80 frutas = 16000 gramos.
Paso 3: Sumar las dos sumas obtenidas. Suma total de los pesos en Z = 4800 gramos + 16000 gramos = 20800 gramos.
Paso 4: Dividir la suma total de los pesos en Z por el número total de frutas en Z. Número total de frutas en Z = 40 frutas + 80 frutas = 120 frutas. Media de los pesos en Z = 20800 gramos / 120 frutas ≈ 173.33 gramos.
Redondeando al gramo más cercano, la media del conjunto de datos Z es 173 gramos.
Similar Questions
The weights of packets of cheese are normally distributed with mean 200 grams and standard deviation 5 grams.Thirty (30) % of packets have a weight greater than Y.Find Y, correct to the nearest gram.
Susan runs an apple and pear orchard. She is collecting data on the average weights of apples, but discovers that the fruit that was weighed for her data included pears. Explain the issues with using this data to find the average weight of apples. Make sure you refer to the population of the data.
Data set A:10,10,10,15,15,15,15,20,20,20,20,20,25,25,25,25,25Data set B:10,10,10,15,15,15,15,20,20,20,20,20,25,25,25,25,25,30The lists give the values in data sets A and B. If a value x is added to the data set A such that the mean of data set A exceeds mean of data set B, then what is the minimum value of x?A30B31C20D25
The mean weight of a class of 39 students is 40 kg. When a new student is admitted, the mean weight decreases by 200 g. Find the weight of new student.
A random sample of 12 items is taken and is found to have a meanweight of 50 grams and a standard deviation of 9 gramsWhat is the mean weight of population1. with 95% confidence2. with 99% confidence
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.