Answer:
Valentina and Laura finished the same total number of shirts in 
hours.
Total number of shirts finished by Valentina 
Total number of shirts finished by Laura
Step-by-step explanation:
Suppose that Valentina and Laura finished the same total number of shirts in 
hours.
Valentina can embroider 2 shirts per hour and Valentina has already completed 15 shirts.
Total number of shirts finished by Valentina 
Laura can get through 3 shirts per hour and Laura has completed 11 shirts.
Total number of shirts finished by Laura 
Therefore,
So,
Valentina and Laura finished the same total number of shirts in hours.
Total number of shirts finished by Valentina 
Total number of shirts finished by Laura 
Answer:
X ~ N(27, 4) ;
xbar ~ N(27, 0.1026) ;
0.5 ;
0.5
Step-by-step explanation:
Probability distribution of X : N(μ, σ²)
μ = 27 ; σ = 2
X ~ N(μ, σ²) = X ~ N(27, 2²) ;X ~ N(27, 4)
Distribution is approximately normal ; μ = xbar ; xbar = 27
(Standard Error)² = (σ/√n)²= (2/√39)² = 0.1026
xbar ~ N(μ, σ²) = xbar ~ N(27, 2²) ; xbar ~ N(27, 0.1026)
Probability that a randomly selected individual found a job in less than 27 weeks :
P(X < 27) :
Obtain the Zscore :
Z = (x - μ) / σ
Z = (27 - 27) / 2 = 0/2
Z = 0
P(Z < 0) = 0.5
D.) n = 36
P(X < 27) :
Obtain the Zscore :
Z = (x - μ) / σ/√n
Z = (27 - 27) / (2/√36) = 0/0.33333
Z = 0
P(Z < 0) = 0.5
The expected value is the mean of the overall observed value or random value. In other words, it is the average of the observed values.
The expected value, E(x) of the given observation is 185
The given parameters can be represented as:
The following formula calculates the expected value:
So, we have:
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Answer:
About 100 times more words in this month than in last month.
Step-by-step explanation:
Last month Levi had written 125 words.
This month he has written 12,589 words
This is 
= 100.64 times more words than in last month
Approximately, Levi has written 100 more times words this month than in last month.
