The following data points represent the number of points scored last basketball game by each player on the dragons basketball te
am. if the mean of the data is eight point find the missing number of points
2 answers:
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Answer:
1) 68%
2) 68%
Step-by-step explanation:
<h2>1) The ages of trees</h2>We know the mean and the standard deviation.
The mean is:
The standard deviation is:
The Z-score formula is:
For x=20 the Z-score is:
For x=30 the Z-score is:
Then we look for the percentage of the data that is between deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of the trees are between 20 and 30 years old
<h2>2) Pizza delivery </h2>First we calculate the Z-scores
We know the mean and the standard deviation.
The mean is:
The standard deviation is:
The z-score formula is:
For x=24 the Z-score is:
For x=30 the Z-score is:
Then we look for the percentage of the data that is between deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of pizzas are delivered between 24 and 30 minutes
P(B) = 8/12
P(R | B) = 4/11
P(B ∩ R) = 8/33
The probability that the first ball chosen is black and the second ball chosen is red is about 24% percent
<em><u>Solution:</u></em>
<em><u>The probability is given as:</u></em>
Given that,
A box contains four red balls and eight black balls
Red = 4
Black = 8
Total number of possible outcomes = 12
Let event B be choosing a black ball first and event R be choosing a red ball second.
<h3><u>Find P(B)</u></h3><em><u>The probability that the first ball chosen is black and the second ball chosen is red is about percent</u></em>
Thus the probability that the first ball chosen is black and the second ball chosen is red is about 24% percent