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Setler [38]
2 years ago
10

The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is

36
36
hours and the median is 32.2
32.2
hours. Twenty-four of the families in the sample turned on the television for 21
21
hours or less for the week. The 11th percentile of the data is 21
21
hours.

Step 3 of 5 : Based on the given information, determine if the following statement is true or false.
Approximately 109
109
families turned on their televisions for less than 32.2
32.2
hours.
Mathematics
1 answer:
lesantik [10]2 years ago
4 0

Answer: hiiii

Step-by-step explanation:

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If two cylinder are similar and the ratio between the lengths of their edges is 4;3 what is the ratio of their volumes
Tems11 [23]

Answer:

64 : 27

Step-by-step explanation:

Given 2 similar figures with

ratio of lengths = a : b, then

ratio of volumes = a³ : b³

For 2 cylinders with ratio of lengths = 4 : 3, then

ratio of volumes = 4³ : 3³ = 64 : 27

3 0
3 years ago
Read 2 more answers
The heights of baby giraffe are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 b
ANEK [815]

Answer:

P(\bar X

And we can solve this using the following z score formula:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And if we use this formula we got:

z = \frac{63-63.6}{\frac{2.5}{\sqrt{100}}}= -2.4

So we can find this probability equivalently like this:

P( Z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(63.6,2.5)  

Where \mu=63.6 and \sigma=2.5

We select n =100. Since the distribution for X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

We want this probability:

P(\bar X

And we can solve this using the following z score formula:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And if we use this formula we got:

z = \frac{63-63.6}{\frac{2.5}{\sqrt{100}}}= -2.4

So we can find this probability equivalently like this:

P( Z

4 0
3 years ago
2x – 5x + 16 = –3(x – 6)
Troyanec [42]

Answer:

0=2

There are no solutions

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
The options for the first one is left or right for the second one the options are mean or median and last ones are IQR or range
DedPeter [7]
With dot plot if it’s symmetrical its the mean and MAD, so i think that.
6 0
2 years ago
Describe the steps on how to graph the ordered pair ( - 3, 4)​
larisa [96]

Answer:

find -3 on the graph on the left side. and go four up from there

Step-by-step explanation:

6 0
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