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Semenov [28]
3 years ago
5

A student organization wondered how many hours per week college students study during a term. Each of the 10 students in the org

anization asked 10 of their friends how much they typically studied each week. A​ 95% confidence interval for the mean number of hours studied per week was​ (18,30). Are the conditions satisfied to use the confidence interval to make an inference to the population of​ interest?
Mathematics
1 answer:
Inga [223]3 years ago
4 0

Answer:

No, a convenience sample was taken.Therefore, the sample may not be representative of all college students in terms of number of hours studied per week.

Step-by-step explanation:

One of the important conditions required in other to estimate the mean of the population from the confidence interval. Requires that the data must be a random Sample. This is to ensure that sample values are not biased and as such are representative of the larger group of data.

However, in the scenario described above, the sample chose. Are friend's of the student, this makes the data lack randomness as those who aren't friends to the student do not stand a chance of being selected. The sampling procedure employed is called convenience sampling.

You might be interested in
What represents the inverse of the function f(x)=4x
Yuki888 [10]

Answer:

\frac{x}{4}

Step-by-step explanation:

The given function is

f(x) = 4x

As we know

f(x) = y, which implies x= f^{-1} (y)

Therefore,

y = 4x

x = \frac{y}{4}

as x= f^{-1} (y)

So,

f^{-1} (y) = \frac{y}{4}

replacing y by x in the above expression

f^{-1} (x) = \frac{x}{4}

So our inverse function is  \frac{x}{4}

4 0
3 years ago
Guys can somebody explain me how to do this?
Natali [406]

Answer:   _L_TS_OF_FLOURS

Each underscore represents an empty box, i.e. a space

I'm assuming your teacher probably meant to have _LOTS_OF_FLOURS

See the explanation below as to why that first "O" is left out.

I would as your teacher for more clarification if s/he made a typo or not.

==========================================================

Explanation:

For the stuff in the top row, we simplify the expression to get a single number. For example,

2^5 = 2*2*2*2*2 = 32

We have five copies of "2" multiplied out

The result of 32 means we'll cross off "32" from the list. This is the one with the lettering of "lV"

As another example,

3^4 = 3*3*3*3 = 81

The exponent tells us how many copies of the base to multiply

The result of 81 means we cross off the entry labeled "bT 81"

----------------

For the stuff in the bottom row, we replace the variables with the numbers associated with them.

When it says a = 2, we replace every copy of 'a' with 2

Something like (3a)^2 will then mean (3*2)^2. Use PEMDAS to simplify and you should get 36 as the result.

Check out the diagram below to see which items are crossed off the list. Each red box represents something that is crossed off the list.

The remaining items that weren't crossed off are:

  • mU  10
  • jG -32
  • eS  1/12
  • lO 1000 .... the first letter is lowercase L
  • hF  -1/32
  • bL 256
  • jF  -196
  • gO  32
  • oS  24
  • dT  36
  • nR 144
  • kL -180

We're given a set of boxes labeled with lowercase letters 'a' through 'p'

We'll write "L" in box "b" since these letters pair together in "bL 256"

Then we have "dT" up next to mean we'll write T in box d

Next letter S goes in box 'e' since we have the code "eS 1/12"

This process is repeated until we end up with _L_TS_OF_FLOURS

where each underscore is an empty box. For example, box 'a' is left empty since none of the remaining codes involve a lowercase 'a'

It appears your teacher made a typo. I'm guessing the answer to the riddle should be "_LOTS_OF_FLOURS", but box c is empty because none of the remaining codes involve lowercase c. We do have the code "cO -32" in the upper left corner, but it has been crossed off the list due to (-2)^5 = -32

6 0
1 year ago
The girls heights in inches are as follows:62,70,60,63,66,what is their average height?​
Gemiola [76]

Answer:

Average height = 64.2 inches

Step-by-step explanation:

Average = \frac{sum \ of \ the \ values }{number \ of\  value}

            =\frac{62 + 70 + 60 + 63 + 66}{5}\\\\=\frac{321}{5}\\\\=64.2 \ inches

4 0
3 years ago
Read 2 more answers
What is the slope of the line that passes through the points (-1, 2) and (-4, 3)?
oksian1 [2.3K]

Answer:-1/3

Step-by-step explanation:

3 0
3 years ago
Simplify.<br><br> 4−16÷4+42<br><br> −16<br> 13<br> 15<br> 16<br>PLEASE HELP
jok3333 [9.3K]
PEMDAS. 16/4 = 4. 4+42 = 46. 46-4 = 42. Answer is 42!
3 0
3 years ago
Read 2 more answers
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