The numbers of courses taught per semester by a random sample of university professors are shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard
deviation of the data set.
Make a frequency distribution for the data.
x f

1 _
2 _
3 _
4 _

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Step-by-step explanation:

Given the plot above :

X (f)fxf * x²

1 222

21734___68

32163___189

41664___256

56 163 ___515

Sample mean = Σfx / Σf

Σfx = 163 ; Σf = 56

Hence sample mean = 163 / 56

= 2.91

Standard deviation (s) :

Sqrt[(Σf*x² - (Σfx)²/Σf)) / Σf]

Sqrt [(515 - 474.45) / 56]

= sqrt(40.55 / 56)

= 0.851

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

step-by-step explanation: