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Gala2k [10]
3 years ago
8

What type of number is 50?

Mathematics
1 answer:
Vladimir [108]3 years ago
8 0
Fifty is an even number
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3 years ago
Don’t understand number 5. HELP
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Please Answer, No links! reporting right away!.. giving brainliest and more points!
loris [4]

Answer:

A) 154x89 _s2

s

Step-by-step explanation:

A) 154x89 _s2

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4 0
2 years ago
in a random sample of 200 people, 154 said that they watched educational television. fine the 90% confidence interval of the tru
melisa1 [442]

Answer:

[0.7210,0.8189] = [72.10%, 81.89%]

Step-by-step explanation:

The sample size is  

n = 200

the proportion is

p = 154/200 = 0.77

<em>Since both np ≥ 10 and n(1-p) ≥ 10 </em>

<em>We can approximate this discrete binomial distribution with the continuous Normal distribution. As the sample size is large enough, not applying the continuity correction factor makes no significant  difference. </em>

The approximation would be to a Normal curve with this parameters:

<em>Mean </em>

p = 0.77

<em>Standard deviation </em>

\bf s=\sqrt{\frac{p(1-p)}{n}}=\sqrt{\frac{0.77*0.23}{200}}=0.0298

The 90% confidence interval for the proportion would be then  

\bf  [0.77-z^*0.0298, 0.77+z^*0.0298]

where \bf z^* is the 10% critical value for the Normal N(0,1) distribution , this is a value such that the area under the N(0,1) curve outside the interval \bf [-z^*,z^*] is 10%=0.1

We can either use a table, a calculator or a spreadsheet to get this value.

In Excel or OpenOffice Calc we use the function

<em>NORMSINV(0.95) and we get a value of 1.645 </em>

The 90% confidence interval for the proportion is then

\bf  [0.77-1.645^*0.0298, 0.77+1.645^*0.0298]=[0.7210,0.8189]

This means there is a 90% probability that the proportion of people who watch educational television is between 72.10% and 81.89%

If the television company wanted to publicize the proportion of viewers, do you think it should use the 90% confidence interval?

Yes, I do.

5 0
3 years ago
Heyyyyyyyyyy kinda need help asap sooooooo plz :)
ss7ja [257]

Answer:

A, B, C, and D, all options are correct.

A is correct because,

∠2 and ∠3 are corresponding angles.

B is correct because,

∠5 and ∠7 are corresponding angles.

C is correct because,

∠2 and ∠4 are corresponding angles.

D is correct because,

∠5 and ∠6 are alternate interior angles.

Note,

If two lines parallel, then

  • Corresponding angles are equal.
  • Alternate interior angles are equal.
4 0
2 years ago
Read 2 more answers
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