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sesenic [268]
1 year ago
11

You ask 40 students which of three items from the cafeteria they like the best. You record the results on the piece of paper sho

wn.
Result of a survey on a paper. First line. What is your favorite cafeteria food? Second line. Pizza: 30 percent. Third line. Pasta: 18 students. Fourth line. Salad: 10 students.

What percent of students answered salad?
% of students answered salad
Mathematics
1 answer:
ivann1987 [24]1 year ago
5 0

Answer:

42%

Step-by-step explanation:

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Step-by-step explanation:

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The volume of wine in liters produced by a parcel of vineyard every year is modeled by a Gaussian distribution with an average o
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Answer:

0.99865

Step-by-step explanation:

The question above is modelled by gaussian distribution. Gaussian distribution is also known as Normal distribution.

To solve the above question, we would be using the z score formula

The formula for calculating a z-score

z = (x-μ)/σ,

where x is the raw score

μ is the population mean

σ is the population standard deviation.

In the above question,

x is 115 liters

μ is 100

σ is the population standard deviation is unknown. But we were given variance in the question.

Standard deviation = √Variance

Variance = 9

Hence, Standard deviation = √9 = 3

We go ahead to calculate our z score

z = (x-μ)/σ

z = (115 - 100) / 3

z = 15/ 3

z score = 5

Using the z score table of normal distribution to find the Probability of having a z score of 5

P(x = 115) = P(z = 5) =

0.99865

Therefore the probability that this year it will produce 115 liters of wine = 0.99865

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2 years ago
Oscar recorded the amount of his monthly electric bill for the first 11 months of the year. An ordered list of the amount in dol
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Step-by-step explanation:

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