2 years ago

What is the probability of a customer buying carrots,?

Mathematics

2 answers:

earnstyle [38]2 years ago

8 0

OPTION 3: 10 percent

VARVARA [1.3K]2 years ago

6 0

Answer:

I think the probability of a customer buying carrots is 10.0

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mya average 86 points on five tests. what would she have to score on the sixth test to bring her average up by one point

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Answer:

The answer is 88.

She would have to score 88

Step-by-step explanation:

86 + 88 = 174

174 ÷ 2 = 87

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3 years ago

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State if triangle is acute obtuse or right

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A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled

klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}$

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

$\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5$

The standard deviation of the sample is calculated as:

$s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8$