20. For the 2017 romantic comedy film, The Last Jedi,300,000 IMDB viewer ratings show a mean of 7.2 stars witha standard deviation of 1.1 stars. How many viewers gavethe film less than 5 stars? Select the single best estimate.A.At most 37,500B.At most 75,000C. At least 37,500D. At least 75,0002020escFSF4F122C34deleteWwQ{UOtabPADGH.KLcaps lockTeturnZC.BshiftshiftcontroloptioncommandcommandoptionCO(DLL.S

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Asked Sep 20, 2019
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20. For the 2017 romantic comedy film, The Last Jedi,
300,000 IMDB viewer ratings show a mean of 7.2 stars with
a standard deviation of 1.1 stars. How many viewers gave
the film less than 5 stars? Select the single best estimate.
A.At most 37,500
B.At most 75,000
C. At least 37,500
D. At least 75,000
20
20
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U
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C.
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20. For the 2017 romantic comedy film, The Last Jedi, 300,000 IMDB viewer ratings show a mean of 7.2 stars with a standard deviation of 1.1 stars. How many viewers gave the film less than 5 stars? Select the single best estimate. A.At most 37,500 B.At most 75,000 C. At least 37,500 D. At least 75,000 20 20 esc FS F4 F12 2 C3 4 delete Ww Q { U O tab P A D G H. K L caps lock Teturn Z C. B shift shift control option command command option CO (D LL. S

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Expert Answer

Step 1

Given Data

Mean = 7.2

Standard Deviation = 1.1

No of Viewers = 300000

u = 7.2
g 1.1
N 300000
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u = 7.2 g 1.1 N 300000

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Step 2

Probability that viewers gave less than five stars are

Sinc...

P(X 5)
Changing into standard normal variate
5 H
5 7.2
Pz s
P
1.1
P(z 2)
P(z -2) 0.02275 z 0.023( From excel
NORM. S. DIST(-2, TRUE))
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P(X 5) Changing into standard normal variate 5 H 5 7.2 Pz s P 1.1 P(z 2) P(z -2) 0.02275 z 0.023( From excel NORM. S. DIST(-2, TRUE))

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