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4 years ago

Please answer this correctly

Mathematics

2 answers:

MaRussiya [10]4 years ago

4 0

Mean is the answer, From 57 to 61 with the addition of 97.

Step-by-step explanation:

for Mode 38 will still be the most repeated number, and for median will be similar with a 1 number difference

Tema [17]4 years ago

3 0

Answer:

Mean

Step-by-step explanation:

Mode:

Before adding 97 = 38

After adding 97 = 38

Mean:

Before adding 97 = 513/9 = 57

After adding 97 = 610/10 = 61

Median:

38, 38 , 38, 43, 54, 56, 70, 79, 97

Before adding 97 = 54

38, 38 , 38, 43, 54, 56, 70, 79, 97, 97

After adding 97 = 54 +56/2 = 110/2 = 55

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4 years ago

The proportion of junior executives leaving large manufacturing companies within three years is to be estimated within 3 percent

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Answer: 709

Step-by-step explanation:

The formulas we use to find the required sample size :-

1. $n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = population standard deviation,

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z* = Critical value

2. $n=p(1-p)(\dfrac{z^*}{E})^2$ , where p= prior estimate of population proportion.

3. If prior estimate of population proportion is unavailable , then we take p= 0.5 and the formula becomes

$n=0.25(\dfrac{z^*}{E})^2$

Given : Margin of error : E= 3% =0.03

Critical value for 95% confidence interval = z*= 1.96

A study conducted several years ago revealed that the percent of junior executives leaving within three years was 21%.

i.e. p=0.21

Then by formula 2., the required sample size will be :

$n=0.21(1-0.21)(\dfrac{1.96}{0.03})^2$

$n=0.21(0.79)(65.3333)^2$

$n=(0.1659)(4268.44008889)\\\\ n=708.134933333\approx709$ [Round to the next integer.]

Hence, the required sample size of junior executives should be studied = 709

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4 years ago

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Step-by-step explanation:

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3 years ago

Read 2 more answers