Find th critical for the middle 50%. Don't unstandardize.

opatovaL 2021-01-15 Answered
Find th critical for the middle 50%. Don't unstandardize.
You can still ask an expert for help

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question

Expert Answer

BleabyinfibiaG
Answered 2021-01-16 Author has 118 answers
μ=53.9
σ=28.5
proportion= 0.5000
proportion left 0.5000 is equally distributed both left and right side of normal curve
z value at 0.25=±0.674(0.502)
z=xμσ
so, X=zσ+μ=
X1=0.67428.5+53.9=34.68
X2=0.67428.5+53.9=73.12
Not exactly what you’re looking for?
Ask My Question

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Relevant Questions

asked 2021-09-19
Find each unknown for problem. Check your work. 1000−n=2581000−n=258
asked 2022-04-08

A particular die thrown a 100 times. The results are as follows:
x 1 2 3 4 5 6
frequency 12 20 27 21 14 6
a) Calculate the sample mean X̅, i.e. the average score you expect when throwing a single die
b) Calculate the corresponding sample standard deviation s
c) Now this experiment is conducted again 35 times. Assuming that the die indeed follows a
distribution with corresponding mean and variance found in a) and b), find the probability that
the sample mean, i.e. the average score of these 35 experiments, exceeds 4.

asked 2021-05-16

Work each problem. Show that 22+22i is a square root of i.

asked 2022-04-01

If eight greet each other at meeting by shakinghands with one another.how many handshake take place?

asked 2021-06-18

Work each problem. Round to the nearest tenth of a degree, if necessary. A record low temperature of 89.4C was recorded at the Soviet Antarctica Station of Vostok on July 21, 1983. Find the corresponding Fahrenheit temperature.

asked 2020-12-17
Montarello and Martins (2005) found that fifth grade students completed more mathematics problems correctly when simple problems were mixed in with their regular math assignments. To further explore this phenomenon, suppose that a researcher selects a standardized mathematics achievement test that produces a normal distribution of scores with a mean of μ=100 and a standard deviation of σ=24. The researcher modifies the test by inserting a set of very easy problems among the standardized questions and gives the modified test to a sample of n = 36 students. If the average test score for the sample is M = 120, is this result sufficient to conclude that inserting the easy questions improves student performance? Use a one-tailed test with α=.05.
The null hypothesis in words is ?
asked 2021-06-05

Work each problem. Find a value of c so that y=x210x+c has exactly one x-intercept.

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question