Tema
Q:
PENSAMIENTO MATEMÁTICO 1
3. Homero acaba de abrir una bolsa de chocolates confitados y los clasifica por color
encontrando 5 naranjas, 7 verdes, 6 azules, 8 amarillos, 5 rojos, y 6 cafés. Realiza
una gráfica de columnas para representar lo que encontró en la bolsa
-
Q:
EJERCICIO 7 -1
Se muestran las tallas de calzado de los últimos 20 clientes que han entrado a una
zapatería
\[ \begin{array}{l}25,22.5,26,26.5,27,25,23,24,24,23,24,24.5,24.5,24,23.5,24.5 \\ 23.5,24.5,25,23.5\end{array} \]
Ordena las tallas y elabora una gráfica de columnas para representar los datos
Q:
A set of exam scores is normally distributed with a mean \( =74 \) and standard deviation \( =8 \).
\( 95 \% \) of the data values lie between 58
\( \% \) of the exam scores are between 66 and 74 .
\( \% \) of the exam scores are between 74 and 90 .
\% of the exam scores are greater than or equal to 66 .
Q:
In a normal distribution, a data value located 1.4 standard deviations below the mean has Standard Score:
\( \mathrm{z}=-1.4 \)
In a normal distribution, a data value located 2.3 standard deviations above the mean has Standard Score:
\( \mathrm{z}=2.3 \)
In a normal distribution, the mean has Standard Score: \( \mathrm{z}=\square \)
Q:
Which of the following statements are TRUE about the Normal Distribution? Check all that apply.
The graph of the Normal Distribution is bell-shaped, with tapering tails that never actually touch
the horizontal axis.
\( 50 \% \) of the data values lie at or above the mean.
about \( 95 \% \) of all data values lie within 1 standard deviation of the mean.
The mean, median and mode are all equal and occur at the center of the distribution.
Data values are spread evenly around the mean.
Data values farther from the mean are less common than data values closer to the mean.
Q:
1.3.1 Bereken die gemiddelde aantal huishoudings in Suid-Afrika wat
gedurende 2022 nie toegang tot die internet gehad het nie.
Q:
A set of exam scores is normally distributed with a mean \( =74 \) and standard deviation \( =8 \).
\( 95 \% \) of the data values lie between 58
\( \% \) of the exam scores are between 66 and 74 .
\( \% \) of the exam scores are between 74 and 90 .
\( \% \) of the exam scores are between 82 and 90 .
\% oxam scores are greater than or equal to 66 .
Q:
A variable is normally distributed with mean 18 and standard deviation 9 . Use your graphing calculator to
find each of the following areas. Write your answers in decimal form. Round to the nearest thousandth as
needed.
a) Find the area to the left of 17.
Q:
The weights for newborn babies is approximately normally distributed with a mean of 6 pounds and
standard deviation of 1.5 pounds.
Consider a group of 1100 newborn babies:
1. How many would you expect to weigh between 3 and 8 pounds?
2. How many would you expect to weigh less than 7 pounds?
3. How many would you expect to weigh more than 6 pounds?
4. How many would you expect to weigh between 6 and 9 pounds?
Q:
A variable \( x \) is normally distributed with mean 21 and standard deviation 5.
a) Determine the \( z \)-score for \( x=27 \).
b) Determine the \( z \)-score for \( x=15 \).
c) What value of \( x \) has a \( z \)-score of 1.8 ?
\( x=x= \)
d) What value of \( x \) has a \( z \)-score of -0.6 ?
e) What value of \( x \) has a \( z \)-score of 0 ?
\( x= \)
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