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USPshnik [31]
3 years ago
15

State the type of hypothesis test to be used in the following situation: Researchers hoped to determine whether time spent watch

ing television is associated with cardiovascular fitness. Subjects were asked how many hours per day they watch television and were classified as physically fit if they scored in the excellent or very good category on a step test. The data obtained is as follows: Physically Fit Not Physically Fit 0 hours 35 147 1-2 hours 101 629 3-4 hours 28 222 5 or more hours 4 34 Determine if the association the researchers were interested in exists or not.
Mathematics
1 answer:
Vikki [24]3 years ago
7 0

Answer:

t-test for difference in slopes

no association exists

Step-by-step explanation:

t-test can be used to determine signifiance in difference in slopes of of fit vs time and not fit vs time graph

The data shows that as number of hours spent watchnig television increases, there is no increasing or decreasing trend in number of people fit or not fit. The number of people fit or not fit seems to be distributed around 629 for 1-2 hours of watching television. There trend is not consistent in both cases with increasing number of hours

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Callum's puppy eats 0.1 of a packet of dog food each day how often must Callum buy a packet of this dog food
Klio2033 [76]

Callum must buy one packet of dog food every 10 days

3 0
2 years ago
Mrs. White's students are making school spirit packs. They have 24 bumper stickers and 18 window clings. Every pack must have th
ExtremeBDS [4]

Answer:

6 packet.

Step-by-step explanation:

Given:

Mrs. White's students are making school spirit packs.

They have 24 bumper stickers and 18 window clings.

Every pack must have the same contents and there should be no leftover items.

Question asked:

What is the greatest number of packs they can make?

Solution:

To find the<u> </u><u>greatest number</u> of packs could be made by 24 bumper stickers and 18 window clings by using<u> </u><u>same contents</u> in each pack with<u> </u><u>no left over </u>items, we will simply use<u><em> Highest Common Factor.</em></u>

Factor of 24 - 2, 3, 4, <em><u>6</u></em>, 8, 12, 24

Factor of 18 - 2, 3, <em><u>6</u></em>, 9, 18

Highest Common Factor is 6.

Thus, they can make 6 packet at most.

3 0
2 years ago
Cal has 3 black pens and 7 blue pens. What is the ratio of the number of black pens she has to the number of blue pens she has?
monitta

Answer:

3/7 or 3 to 7 both are the same ratio.

Step-by-step explanation:

4 0
3 years ago
Math help 20 points<br> help
astra-53 [7]

Answer:

1. x =8

2.  x=9

Step-by-step explanation:

Since these figures are parallelograms, the opposite sides are equal.

1.     6 = 2x-10

Add 10 to each side

   6+10 = 2x-10+10

   16 = 2x

Divide  each side by 2

16/2 = 2x/2

 8 =x


2.  x+14 =23

    Subtract 14 from each side

x+14-14 = 23-14

x = 9



6 0
3 years ago
Use the recursive formula f(n) = 0.5 ⋅ f(n − 1) + 10 to determine the 2nd term if f(1) = 4.
Nikitich [7]

Answer:

Option B. f(2) = 12.0

Step-by-step explanation:

we have

f(n)=0.5f(n-1)+10

we know that

The second term is f(2)

For n=2

substitute the value of n in the formula

f(2)=0.5f(2-1)+10

f(2)=0.5f(1)+10

we have

f(1)=4

substitute

f(2)=0.5(4)+10

f(2)=12.0

6 0
3 years ago
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