Answer:
The correct answer is "Investigating the mean of the sample is the same as investigating the sampling distribution of the mean"
Step-by-step explanation:
For sampling distribution of the mean, if the size of population is n, and its mean is μ and the population standard deviation is σ, then the mean of all sample means also becomes equal to the population mean μ but for that the samples are taken randomly from the given population
Answer:
Hotdog: $1.50
Hamburger: $3.25
Step-by-step explanation:
<em>You write down the 2 equations based off of the information as I did:</em>
Let x = cost of a hotdog
Let y = cost of a hamburger
<em>and so:</em>
<em />
3x + 2y = 11
2x + 4y = 16
<em />
<em>Now, we need to find x and y:</em>
<em>We will make both equations equal to y to compare them to each other.</em>
2y = 11 - 3x
y = 5.5 - 1.5x
4y = 16 - 2x
y = 4 - 0.5x
4 - 0.5x = 5.5 - 1.5x
x = $1.5
<em>Now plugging in x into the equation:</em>
2(1.5) + 4y = 16
3 + 4y = 16
4y = 13
y = $3.25
And so hotdog = $1.5 and hamburger = $3.25
<em />
<em />
Answer:
The probability that x is less than 9.7 is 0.0069 = 0.69%
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
The probability that x is less than 9.7 is _____.
This is the pvalue of Z when X = 9.7. So
has a pvalue of 0.0069
The probability that x is less than 9.7 is 0.0069 = 0.69%
Answer:
that's a good question that's why I will tell you ask your teacher
Answer:
s_5=8404
Step-by-step explanation:
This is a geometric series so we can use the formula
S_5=2500-2500*.8^5/1-.8
s_5=2500-2500*.32/.2
s_5=2500-819.2/.2
s_5=1680.8/.2
s_5=8404
