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3 years ago

Least common multiple of 168 and 76

Mathematics

2 answers:

Stella [2.4K]3 years ago

5 0

Answer:

3192

this is the answer but if you need to show work then I can't help ya bud

yuradex [85]3 years ago

4 0

Answer:

Best to draw out a factor tree.

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2) Dorothy types 120 words per minute. How many words does Dorothy type in

Damm [24]

Answer:

D (210)

Step-by-step explanation:

120 times 1.75 equals 210

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3 years ago

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What is the equation for 87÷75.69

vova2212 [387]

Step-by-step explanation:

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2 years ago

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WARRIOR [948]

Answer:

Step-by-step explanation:

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3 years ago

In a normal distribution, 95% of the data fall within how many standard deviations of the mean? O A. Three standard deviations B

Galina-37 [17]

Answer:

Two standard deviations

Step-by-step explanation:

The Z score is obtained using the mean and standard deviation, according to the empirical. Rule, which gives percentage of values that lie within an interval estimate in a normal distribution ;

one standard deviation lie within 68% of the mean

Two standard deviations lie within 95%

Three standard deviations lie within 99.7%

Hence, for the question given, 95% fall within 2 standard deviations of the mean

4 0

3 years ago

In 2014, the CDC estimated that the mean height for adult women in the U.S. was 64 inches with a standard deviation of 4 inches.

Vladimir79 [104]

Answer:

A. 16%

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 64, \sigma = 4$

Which of the following gives the probability that a randomly selected woman has a height of greater than 68 inches?

This is 1 subtracted by the pvalue of Z when X = 68. So

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

$Z = \frac{68 - 64}{4}$

$Z = 1$

$Z = 1$ has a pvalue of 0.84.

1 - 0.84 = 0.16

So the correct answer is:

A. 16%

6 0

3 years ago