1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gavmur [86]
3 years ago
11

From a population with standard deviation 25, a sample of size 100 is drawn. The mean of the sample is 235. Construct a 90% conf

idence interval for the true mean of the population. 2. Joey says that 90% of the observations are in this interval. Is Joey right? If not, what is the proper interpretation of this 90% confidence interval? 3. An evaluator wishes to make a statement about the emotional maturity of the freshmen population, so she decides to sample the population and administer an emotional maturity test. Putting aside any concerns about the validity of the test used, and considering the sample techniques only, how many students should she sample in order to be 95% confident that her estimate of freshman emotional maturity will be within 6 units of the true mean? (The test publishers indicate that the population variance is 100 units.)

Mathematics
1 answer:
pickupchik [31]3 years ago
6 0

Answer:

See explaination and attachment

Step-by-step explanation:

Given the parameters we have, we want to Construct a 90% confidence interval for the true mean of the population.

Hence, making use of these parameters;

sample size =100

Std deviation =25

mean if the sample=253.

Therefore solving for 90% confidence interval for the true mean of the population. We will apply a formula.

Please kindly check attachment gor the step by step solution for all the questions.

You might be interested in
Please explain absolute values?
myrzilka [38]

Answer:

the magnitude of a real number without regard to its sign.

Step-by-step explanation:

For example, |-3| would just be a 3 in general, no negative sign in the front.

hope this answers your confusion.

7 0
3 years ago
Read 2 more answers
Which is the correct way to represent 0.0035 kg by using scientific notation? –3.5 103 kg –3.5 10–3 kg 3.5 10–3 kg 3.5 103 kg?
Vlada [557]
It would be

3.5 × 10⁻³ kg.

The decimal point must be moved 3 places to the right in order to have it behind the first non-zero digit; this gives us the exponent of 3, and since we are moving the decimal to the right, it is a negative exponent.
5 0
3 years ago
Read 2 more answers
Write log7t using the natural logarithm.
VARVARA [1.3K]

Answer:

log₇t = ln t / ln 7

Step-by-step explanation:

Given:

log₇t

Computation:

We know that

logₐb = log b / log a

So,

log₇t = log t / log 7

= log₇t = ln t / ln 7

4 0
3 years ago
Find all angles, 0 ≤C<360 that satisfy the equation below, to the nearest tenth of a degree.
ludmilkaskok [199]

Move all the terms involving the sine to one side, and all the numbers to the other:

9\sin(c)-2=\sin(c)-7 \iff 8\sin(c) = -5\iff \sin(c)=-\dfrac{5}{8} \iff c = \arcsin\left(-\dfrac{5}{8}\right)\approx 321.3

7 0
3 years ago
What is 275 divided by 38
Triss [41]

Answer:

The answer is 7.2368421053 .

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is 201-[4(2+6)+15?
    15·2 answers
  • The mass of a fluorine atom is 3.16 × 10 - 23 g. What is the mass of 1,000,000,000 fluorine atoms? express your awnser scientifi
    8·1 answer
  • John runs at different speeds as part of his training program. the graph shows his target heart rate at different times during h
    10·1 answer
  • Chloe measured the rectangular label in her new dress.
    10·1 answer
  • 0.34÷9.67 round to nearest tenth
    14·2 answers
  • WILL MARK U BRAINLIEST PLEASE HELP
    13·2 answers
  • which of the following equations have no soltuions? 4x+5=4x+5 -4x+5=-4x-5 5x+5=-4x-5 -4x+5=-4x-4 choose all the answers that app
    10·1 answer
  • Find the value of x given m (I need a lot of help)
    13·2 answers
  • 3/5 por 1/4 porfa es urgente
    14·1 answer
  • P=(m+n)/-5 solve for n
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!