New York City Weather New York City’s mean minimum daily temperature in February is 27 ° F (http://www.ny.com). Suppose the standard deviation of the minimum temperature is 6 ° F and the distribution of minimum temperatures in February is approximately Normal. What percentage of days in February has minimum temperatures below freezing ( 32 ° F )?
New York City Weather New York City’s mean minimum daily temperature in February is 27 ° F (http://www.ny.com). Suppose the standard deviation of the minimum temperature is 6 ° F and the distribution of minimum temperatures in February is approximately Normal. What percentage of days in February has minimum temperatures below freezing ( 32 ° F )?
Solution Summary: The author determines the percentage of days in February that have minimum temperatures below the freezing point. The required percentage is approximately 80%.
New York City Weather New York City’s mean minimum daily temperature in February is
27
°
F
(http://www.ny.com). Suppose the standard deviation of the minimum temperature is
6
°
F
and the distribution of minimum temperatures in February is approximately Normal. What percentage of days in February has minimum temperatures below freezing (
32
°
F
)?
Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
The masses measured on a population of 100 animals were grouped in the
following table, after being recorded to the nearest gram
Mass
89 90-109 110-129 130-149 150-169 170-189 > 190
Frequency 3
7 34
43
10
2
1
You are given that the sample mean of the data is 131.5 and the sample
standard deviation is 20.0. Test the hypothesis that the distribution of masses
follows a normal distribution at the 5% significance level.
state without proof
the uniqueness
theorm of probability
function
(a+b)
R2L
2+2*0=?
Ma
state without proof the uniqueness theorm
of probability function suppose thatPandQ
are probability measures defined on the
same probability space (Q, F)and that
Fis generated by a π-system if P(A)=Q(A)
tax for all A EthenP=Q i. e. P(A)=Q(A) for alla g
// معدلة 2:23 ص
Elementary Statistics: Picturing the World (7th Edition)
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