1/4 x -2>1 and the grater than sign has a line under it.

Mathematics

1 answer:

antoniya [11.8K]3 years ago

8 0

For this inequality x is greater than or equal to 12

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Which one is bigger 25 mm or 3 cm

Marat540 [252]

Answer:

3 cm

Step-by-step explanation:

3 cm converted to mm would be 30 mm which is bigger than 25 mm

8 0

3 years ago

A set of data items is normally distributed with a mean of 400 and a standard deviation of 60. Find the data item in this distri

Softa [21]

Answer:

The data item is $X = 580$

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 400 and a standard deviation of 60.

This means that $\mu = 400, \sigma = 60$