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liberstina [14]
3 years ago
15

Need help with special right triangles

Mathematics
1 answer:
svetoff [14.1K]3 years ago
6 0

Answer:

explain what you need help about then i will try to help you

Step-by-step explanation:

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A researcher wants to determine whether the number of minutes adults spend online per day is related to gender. A random sample
suter [353]

Answer:

The expected frequency for the cell E2,2 is = 33

Step-by-step explanation:

The given data is

Gender               | 0-30| 30-60| 60-90| 90+       Totals

Male                    | 23    |    35   |   76    |  46        180

<u> Female               |   31   |    42   |   46    |  16         135    </u>

<u>Totals                    54         77        122    62          315  </u>

<u />

The expected frequency for the cell E2,2 is :

Expected for the (30-60 box for females)   =  Total of (30-6)/ (total )* females

                                                                      = ( 77/315)135= 33

Here p= 77/315 and n= 135

therefor X= pn = 33

χ²=  (33-42)²/33= 2.455  ( for the single value of E2,2=33)

Expected for the (30-60 box for males)   =  Total of (30-6)/ (total )* males

                                                                      = ( 77/315)180= 44

χ²=  (44-42)²/44= 0.09

The critical region is  χ² (0.05) 3 ≥  χ²= 11.34

Let the null and alternate hypothesis be

H0:the number of minutes spent online per day is not related to gender

against

Ha: the number of minutes spent online per day is related to gender

The single value of χ² for E2,2 = 2.45 is less than the critical value of 11.34.  

6 0
3 years ago
a new car has a sticker price of 20950 while the invoice price paid was 18750. what is the dealer markup
maksim [4K]

Answer:

1875= $2200

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
5 divided by 978 with remainder
grigory [225]

Hi!

978 can't go into 5 at all, so the answer is 0 R: 978

Hope this helps! :)

-Peredhel

6 0
3 years ago
Read 2 more answers
Which ratio is proportionate to 9/3​
Helga [31]

Answer:

3/1

simplify 9/3

3/1 is the answer

7 0
3 years ago
I put this into my calculator but it keeps coming out as "error" :/ not sure if it's just my calculator or something with the pr
Triss [41]
Your calculator says error because you cant have a square root of a negative number because there is no solution to that maybe recheck your equation and try again
8 0
3 years ago
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