18. Calculate the variance and standard deviation for the monthly income of 50 employees in a firm. Explain the meaning of the value of standard deviation obtained. Number of emplovees Monthly income (RM) 500<700 700<900 4. 900<1100 15 1100<1300 1300<1500 1S

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A:

Q: P(75<x<105) mean is 80 and standard deviation is 94

A: Mean = 80 Standard deviation = 94

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A: Standard deviation: σ=xi-x2n

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A: The provided information is:

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A: Given data, n=1500 μ=360000σ=4000 P(-z&lt;Z&lt;z)=0.93

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Q: How do you compute the range, interquartile range and standard deviation

A: formula's of Range , Interquartile range and standard deviation.

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A: We have find givan probability..

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A: It is given, A normal distribution with 2 standard deviation.

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Q: TRUE OR FALSE: the standard deviation describes the average deviation between the individual scores…

A: The standard deviation is a measure of dispersion. It measures the data on how much they have…

Q: Scores in a particular Mathematics test are normally distributed with mean of 175 and standard…

A: given datanormal distributionμ=175σ=20p(105&lt;x&lt;180) = ?

Q: How to estimate distribution

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A: X follows a Normal distribution with mean = 10.9 and S.D = 5.4 Then z=(x-mean)/SD = (x-10.9)/5.4…

Q: 8. What symbol is used to identify the standard error of the mean?

A: To find The symbol used to identify the standard error of the mean.

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A:

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A: here as per guideline i have calculated 3 subparts , plz repost for remainning. Suppose that the…

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A: From the given information, Thus, the Z score for the difference of the means can be computed as:

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A: Given: A student gets marks in 10 subjects as 38, 70, 48, 34, 42, 55, 63, 46, 54 and 44. The mean…

Q: 8. mean = 23.8; standard deviation = 5,2

A: Given data : Population Mean,μ = 23.8 Population Standard Deviation,σ = 5.2

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A: The students that scored higher than 78 are given by: The students that scored between 74 and 82…