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Serhud [2]
3 years ago
8

6.1.8 The following set of scores was obtained from a quiz: 4, 5, 8, 9, 11, 13, 15, 18, 18, 18, 20. The teacher computes the usu

al descriptive measures of central tendency and spread for these data and then discovers that an error was made. One of the 18s should have been a 16. Which of the following measures will NOT need to be changed from the original computations? (There may be more than one correct answer.) Mean Median Standard deviation IQR They all will need to be changed.
A. Mean
B. Median
C. Stndard Deviation
D. IQR
E. They will need to be changed
Mathematics
1 answer:
Inessa05 [86]3 years ago
4 0

Answer:

B. Median

D. IQ R

Step-by-step explanation:

from the given data :

mean = 12.6364 , median =13,

st. dev = 5.6262

Q3 = 18 , Q1 = 8

IQ R = Q3 - Q1 = 18-8 = 10

One of the 18s should be 16 then,

mean = 12.4545, median = 13,

st. dev = 5.4656

Q3 = 18 , Q1 = 8

IQ R = Q3 - Q1 = 18-8 = 10

So, median and IQ R will not need to be changed

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Please help. Thank you
erastova [34]

Answer:

(1, -12)

Step-by-step explanation:

x is the horizontal axis and y is the vertical axis.

The current coordinates of D are (-5, -2).

Translated...

D = (-5 + 6, -2 - 10)

D = (1, -12)

3 0
3 years ago
Help with this answer please?
puteri [66]
It would be Adjacent/hypotenus which is 36/39 and when simplified the answer is 12/13
3 0
3 years ago
Read 2 more answers
Whats the square root of 39 to the nearest whole
Rasek [7]
The square root of 39 is 6.224
5 0
3 years ago
A bank's loan officer rates applicants for credit.
Artist 52 [7]

Answer:

a=200 +0.253*50=212.65

So the value of height that separates the bottom 60% of data from the top 40% is 212.65. And rounded would be 212.7.  

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Solution to the problem

Let X the random variable that represent the loan officer rates applicants for a credit of a population, and for this case we know the distribution for X is given by:

X \sim N(200,50)  

Where \mu=200 and \sigma=50

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.40   (a)

P(X   (b)

Both conditions are equivalent on this case.

As we can see on the figure attached the z value that satisfy the condition with 0.60 of the area on the left and 0.40 of the area on the right it's z=0.253. On this case P(Z<0.253)=0.60 and P(z>0.253)=0.4

If we use condition (b) from previous we have this:

P(X  

P(Z

But we know which value of z satisfy the previous equation so then we can do this:

z=0.253

And if we solve for a we got

a=200 +0.253*50=212.65

So the value of height that separates the bottom 60% of data from the top 40% is 212.65. And rounded would be 212.7.  

5 0
3 years ago
Write the equation of the line in slope intercept form given the slope is -6 and the y-intercept is -3
Sauron [17]

Answer:

C) y = -6x-3

Step-by-step explanation:

y = mx + b

the m is the slope and the b is the y intercept

3 0
2 years ago
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