Question

A population N=9 scores has a mean of u=21. If one score is
changed from x=14 to x=32, what will be the value for the new mean?
Be sure to show all formulas with symbols (and plug in numbers),
steps, processes and calculations for all parts of all
answers.

Answer #1

Given that a population N=9 has a mean of µ=21.

Now that one score is changed from X=14 to X=32, now we need to find the value for the new mean.

We know that,

**[Now one score is changed from X=14 to X=32 so we
subtract 14 from the total and add 32 to the total.]**

**Hence the value for the new mean is 23**

A sample of n=18 individuals is selected from a population with
a mean of µ=77, and a treatment is administered to the individuals
in the sample. A treatment is administered to the individuals in
the sample and after treatment, the sample variance is found to be
s2=144.
a. If the treatment has a 3-point effect and produces a sample mean
of M=80, is this sufficient to conclude that there is a significant
treatment effect effect using a two-tailed test with...

A researcher who is evaluating the significance of a regression
equation with one predictor variable obtains an F-ratio with df =
1, 16. How many pairs of scores, x and y values, are in the data?
Be sure to show all formulas with symbols (and plug in numbers),
steps, processes and calculations for all steps and all parts of
all answers.

A published report of a repeated measures research study
includes the following description of the statistical analysis.
"The results show significant differences among the treatment
conditions, F(2,20)=6.10,p<.01."
a. How many treatment conditions were compared in
the study? Explain in detail and be sure to show all formulas with
symbols (and plug in numbers), steps, processes and calculations
for all steps and all parts of all answers.
b. How many individuals participated in the
study? Explain in detail and be sure...

18. A researcher is comparing two sets of instructions for
assembling a bicycle. Of the 14 people using the first set of
instructions, only 5 were able to assemble the bike completely in
30 minutes. Of the 14 people using the second set of instructions,
9 completed assembly in 30 minutes. Convert the data into a form
suitable for the phi-coefficient and compute the phi-correlation
for these data. Be sure to show all formulas with
symbols (and plug in numbers), steps,...

A population of scores has a mean of 44. In this population a
score of X= 40 corresponds to z = -0.50. What is the population
standard deviation?

#2. Find the mean, median, and mode for the following sample of
scores:
3, 6, 7, 3, 9, 8, 3, 7, 5
Mean=
Median=
Mode=
#4. Find the mean, median, and mode for the scores in the
following frequency distribution table:
X
F
8
1
7
1
6
2
5
5
4
2
3
2
Mean=
Median=
Mode=
#6. A population of N = 15 scores has SX= 120. What is the
population mean?
#10 One sample has a...

3. A population of scores has µ = 44. In this
population, a score of X = 40 corresponds to z = –0.50.
What is the population standard deviation?
a.
2
b.
4
c.
8
d.
-8
4. Last week Tim got a score of X = 54 on a math exam
with µ = 60 and σ = 8. He also got X =
49 on an English exam with µ = 55 and σ = 3, and
he...

9. A set of scores has a mean of 20. If each score is multiplied
by 10, what will happen to the mean?
A) The mean will not change
B) It will be equal to the original mean multiplied by 10
C) It will be equal to the original mean multiplied 2
D) Cannot be determined from the information given
12. A population of N = 15 has a mean of μ = 25. After one score
is removed from...

-5, -32, -13, -9, -19, 49, -30, -23, 14, -21, -32, 11 are the
arrival delays of randomly selected American Airlines flights from
New York to Loss Angeles. Negative numbers represent flights that
arrived before the scheduled arrival time. Use 95% confidence
interval. How good is the on-time performance?
PLEASE SHOW ALL STEPS CLEARLY. Thank you. I Believe the answer
is -24.33 to 5.99.

Suppose a random sample of n=64 measurements is selected from a
population with mean u and standard deviation o. For each of the
following values of u and o, give the values of u-x and 0-x.
a. u=14,
o=5
b.u=196,
o=64
c.u= 28,
o=72
d. u=14, o=176

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 18 minutes ago

asked 46 minutes ago

asked 48 minutes ago

asked 55 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago