Question

this same researcher then randomly selects on a child from each of the eight families in which there's a least one child. interested in the effects of numbers of siblings (x) on the happiness of the child (y) on a scale, from 1 (very unhappy) to 10 (very happy), test the hypothesis BY HAND that there's a positive relationship between the two values use 0.05

siblings X (1,0,2,4,2,3,1,1) happiness Y(5,3,4,7,5,9,8,4)

Answer #1

Thus the correlation coefficient is not significant

This same researcher collected at random one child from each of
the eight families in which there was at least one child. She
recorded the following data to study the effects of number of
siblings (X) on happiness of the child (Y), measured on an interval
scale in which low scores indicate a low level of happiness and
high scores indicate a high level of happiness:
X
Y
1
5
0
3
2
4
...

(Typed work preferable. Show step-by-step please.)
1. A researcher collected at random one child from each of the
eight families in which there was at least one child. She recorded
the following data to study the effects of number of siblings (X)
on happiness of the child (Y), measured on an interval scale in
which low scores indicate a low level of happiness and high scores
indicate a high level of happiness:
X
Y
1
5
0
3
2
4...

1) A researcher is running an experiment on the effectiveness of
three different energy drinks. She randomly selects 60 individuals
from the population and evenly splits them into three groups, each
of which consumes a different energy drink.
a. The null hypothesis for this test is that at least one of the
three groups will be different. True or False?
The statistical results of the test are as follows: F(2, 47) =
6.24, p < .05.
b. In the above...

PART 1:
Critical Thinking
ARTICLE
adapted from:
Low-Income Parents Of 'Difficult Children' Likely To Use iPads
To Pacify Kids
2 March 2016, 9:27 pm EST By Angela Laguipo Tech
Times
In a world of technological advancement, mobile devices are
widely used by people of all ages, including children. A new study
found that when children are in tough situations and are having
emotional difficulties, their parents are more likely to give an
iPad than when the children are behaving calmly....

A researcher wants to examine the relationship between time
spend on social media (variable X) and loneliness (variable Y) in
young adults. A randomly sample of n = 72 young adults was asked
how much time in average they spend on social media each day and
how lonely day feel on a typical day.
The partial computations of collected data produced the
following results:
SP = 3.5
MX =
5 SSx =
16 MY =
20 SSY=
9
A. Based on these...

1. For a pair of sample x- and y-values, what is the difference
between the observed value of y and the predicted value of y? a) An
outlier b) The explanatory variable c) A residual d) The response
variable
2. Which of the following statements is false:
a) The correlation coefficient is unitless. b) A correlation
coefficient of 0.62 suggests a stronger correlation than a
correlation coefficient of -0.82. c) The correlation coefficient,
r, is always between -1 and 1....

Problem Set 2: Pearson’s correlation (7
pts)
Research Scenario: Is there a positive
relationship between grit and GPA in high school seniors? A
researcher examined this issue by having students beginning their
senior year of high school complete a grit inventory using a
Likert-based scale (range 1 – 7), where higher numbers indicate
more “grit”. GPA was self-reported (scale 0 – 4.0). Enter the data
shown here into SPSS to assess whether there is a positive
relationship between grit and...

DIRECTIONS: This is an open book, take home examination. You may
look up the answers and discuss them, if you wish. The Multiple
Choice questions will be worth 1 point each and the essay questions
will be worth 25 points each. This examination is over Chapters 6
through 9. MULTIPLE CHOICE: 1. During Piaget's concrete operational
stage, children a. are more egocentric than they were during the
preoperational period. b. often confuse appearances with reality.
c. are unable to reverse...

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