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Misha Larkins [42]
3 years ago
14

A researcher is interested in the whether the number of times each week people exercise differs between Canadians and British pe

ople. To test this, she asks 1000 people (500 Canadians and 500 British) how often they exercise a week. Given the preceding experimental description, what is the most appropriate statistical test to use? a. a correlation b. a t-test c. a Chi Squared d. an ANOVA
Mathematics
1 answer:
denis23 [38]3 years ago
4 0

Answer:

t-test

Step-by-step explanation:

t-test is used to determine if their is a significant difference between averages or means of two groups or data set. There are three types of t-test;

Independent sample t-test which compares the means for two group; paired sample t-test which compares at the different times the means from the same data set or group and finally one sample t-test which compares a single group against a known mean. It involves the forming of null hypothesis; the two mean are the same or equal and after several calculations to get some important values, the values are compared with standard values and the null hypothesis is either accepted or rejected.

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This question has been difficult for me
olchik [2.2K]
So the area of a circle is πr²

if the diameter of the sign 30 in then the radius is 15 in

Now Area of Circle = π(15 in)²
                               
                              =  706.86

Thus by estimation the best answer is OPTION C
7 0
3 years ago
The following distribution is not a probability distribution because
olasank [31]

Answer:

C The probability values do not add to 1

Step-by-step explanation:

Given

The above table

Required

Why is it not a probability distribution

In probability, the sum of all probabilities must equal 0.

But in this case:

\sum P(x) \ne 0

Because:

0.08 + 0.23 + 0.44 + 0.12 + 0.24 \ne 0

1.11 \ne 0

Hence:

Option (c) answers this question

4 0
2 years ago
How to put (x+1)(x+1)(x-1) in standard form
Ludmilka [50]
Hello! And thank you for your question.

All you are going to do is use the formula for the standard form.

Ax + By = C

Final Answer:

x³ + x² - x - 1
5 0
3 years ago
Find the measure of c. A. 136 B. 144 C. 123 D. 149
-BARSIC- [3]

Answer:

Option (D)

Step-by-step explanation:

Given quadrilateral in the circle is a cyclic quadrilateral.

By using the property of cyclic quadrilateral,

"Sum of each pair of opposite angles is 180°".

In the given cyclic quadrilateral,

d + 57° = 180°

d = 180 - 57

d = 123°

Similarly, c + 31° = 180°

c = 180° - 31°

c = 149°

Therefore, Option (D) will be the answer.

4 0
3 years ago
1.8+3.5y+0.9+9=16.2<br> plz help
saul85 [17]

Answer:

The Awnser Is Y=9/7

Step-by-step explanation:


7 0
3 years ago
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