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gogolik [260]
3 years ago
10

A scientist is studying the impact of certain vitamins on a person's ability to remember. The sample size for the experimental g

roup was 25. When a two-tailed t test was calculated, the t statistic came out to be 1.54. What are the percent of variance (r 2) and the size of the effect
Mathematics
1 answer:
vovikov84 [41]3 years ago
3 0

Answer:

0.09 average effect

Step-by-step explanation:

Given that the t statistics = 1.54

Sample size (n) = 25

Therefore, variance = t²/n

Variance = 1.54²/25

Variance = 2.372/25

Variance = 0.09

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A group of students is riding in a bike tour. They have biked 15 miles, which is 25% of the tour. How long is the tour?
igor_vitrenko [27]

Answer:

60 miles

Step-by-step explanation:

25% of 60 = 15

Hoped this helped<33

3 0
2 years ago
Prove: Every point of S=(0, 1) is an interior point of S.
myrzilka [38]

Answer:

Proved

Step-by-step explanation:

To prove that every point in the open interval (0,1) is an interior point of S

This we can prove by contradiction method.

Let, if possible c be a point in the interval which is not an interior point.

Then c has a neighbourhood which contains atleast one point not in (0,1)

Let d be the point which is in neighbourhood of c but not in S(0,1)

Then the points between c and d would be either in (0,1) or not in (0,1)

If out of all points say d1,d2..... we find that dn is a point which is in (0,1) and dn+1 is not in (0,1) however large n is.

Then we find that dn is a boundary point of S

But since S is an open interval there is no boundary point hence we get a contradiction. Our assumption was wrong.

Every point of S=(0, 1) is an interior point of S.

3 0
3 years ago
1.) what does X equal 4x = -12 <br> 2.)
Eddi Din [679]

Answer:

-3

Step-by-step explanation:

this is x equals to -3

we can divide the 4 to other side

7 0
3 years ago
Read 2 more answers
Mr. Peterson sold a parcel of land and decided to share half of the amount he got among his three children Jane, Peter and marth
aliya0001 [1]

Answer:

60,000

Step-by-step explanation:

Jane-2000

Peter-ratio of 5=25000

Marta-ratio of 7=35000

25000+35000

60000

5 0
3 years ago
Read 2 more answers
Which proportion could be used to find the length of side b?​
Goshia [24]

Answer:

B

Step-by-step explanation:

Using the Sine Rule in ΔABC

\frac{a}{sinA} = \frac{b}{sinB} = \frac{c}{sinC}

∠C = 180° - (82 + 58)° = 180° - 140° = 40°

Completing values in the above formula gives

\frac{a}{sin58} = \frac{b}{sin82} = \frac{8.4}{sin40}

We require a pair of ratios which contain b and 3 known quantities, that is

\frac{b}{sin82} = \frac{8.4}{sin40}

OR

\frac{sin40}{8.4} = \frac{sin82}{b} → B

8 0
3 years ago
Read 2 more answers
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