Question

A population is 50 and the sample is 10. If each score is multiplied by 2, what will the new standard deviation be?

Sample = standard devation

Answer #1

For the following sample of n =8 scores: 0, 1, 1/2, 0, 3, 1/2 ,
0, 1
a. Simplify the arithmetic by first multiplying each
score by 2 to obtain a new sample. Then, compute
the mean and standard deviation for the new
sample.
b. Starting with the values you obtained in part a,
make the correction for having multiplied by 2 to
obtain the values for the mean and standard deviation
for the original sample

What is the new deviation score (distance from the sample mean
or estimated population mean) for the specification upper limit and
lower limit, respectively? Then divide the deviation scores in Q2
by the estimated population standard deviation to standardize these
scores (gives a Z score).
54
58
57
56
56
55
54
55
57
56
57
55
56
56
55
56
57
54
57
55

A person must score in the upper 2% of the population on an IQ
test to qualify for membership in Mensa, the international high-IQ
society. If IQ scores are normally distributed with a mean of 100
and a standard deviation of 10, what score must a person have to
qualify for Mensa?

A population has a mean of 50 and a standard deviation of 10. If
a random sample of 36 is taken, what is the probability that the
sample mean is each of the following? a. Greater than 53 b. Less
than 52 c. Less than 48 d. Between 46.5 and 53.5 e. Between 50.5
and 51.6

To
calculate z score , you have to know the raw score , population
mean , and standard deviation. Of the following what matches with
the three ; Sample proportion , Sample size , wnd Popularion
proportion .

Question #8: The score of the LSAT examination have a population
mean µ = 70 and population standard deviation σ = 10. Answer the
questions below and show work.
1.) A random sample of 64 individuals is taken. What is the
probability that the sample mean is below 71?
2.) A random sample of 100 individuals is taken. What is the
probability that the sample mean is below 71?

The overall average score on a test of Emotional Intelligence is
50 for the general population. A member of the
admissions committee for the Ph.D. program in clinical psychology
at OU wants to know whether applicants to the program are higher in
Emotional Intelligence than the general
population. Twenty-five applicants were randomly
selected from the applicant pool and were given the Emotional
Intelligence test. The applicants’ mean score was 60
with a standard deviation of 10. Use an alpha level
equal to 0.01 to...

A population has a mean of 200 and a standard deviation of 50.
Suppose a simple random sample of size ̅ 100 is selected and ? is
used to estimate ?. 1. What is the probability that the sample mean
will be within ±5 of the population mean? 2. What is the
probability that the sample mean will be within ±10 of the
population mean?

Consider the following hypothesis test: H 0: 50 H a: > 50 A
sample of 50 is used and the population standard deviation is 9.
Use the critical value approach to state your conclusion for each
of the following sample results. Use = .05.
a. With = 52.5, what is the value of the test statistic (to 2
decimals)? Can it be concluded that the population mean is greater
than 50?
b. With = 51, what is the value of...

A population has a mean of 200 and a standard deviation of 50.
Suppose a sample of size 100 is selected and is used to estimate .
Use z-table. What is the probability that the sample mean will be
within +/- 4 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.) What is the
probability that the sample mean will be within +/- 11 of the
population mean (to 4 decimals)? (Round...

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