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
sergij07 [2.7K]
3 years ago
5

The American Psychological Associated conducted a survey in 2003 of psychologists to estimate the average incomes for psychologi

sts based on their academic degree and years of experience. 36 psychologists responded who had a just received their masters degree in 2003. The average was $48,800 with a standard deviation of $16,800.
Mathematics
1 answer:
Alex Ar [27]3 years ago
6 0

This question is incomplete, the complete question;

The American Psychological Associated conducted a survey in 2003 of psychologists to estimate the average incomes for psychologists based on their academic degree and years of experience. 36 psychologists responded who had a just received their masters degree in 2003. The average was $48,800 with a standard deviation of $16,800.

The 95% Confidence Interval is ($, $ )

Answer:

at 95%, confidence interval is ( $43312, $54288 )

Step-by-step explanation:

Given the data in the question;

sample size n = 36

mean x' = 48,800

standard deviation σ = 16,800

at 95% confidence level;

∝ = 1 - 95% = 1 - 0.95 = 0.05

∝/2 = 0.05 / 2 = 0.025

z critical value, Z_{\alpha/2 = 1.96

now, confidence interval for population mean is given by the formula

x' ±  Z_{\alpha/2( σ/√n )

so we substitute

⇒ 48800 ±  1.96( 16800/√36 )

⇒ 48800 ±  1.96( 2800 )

⇒ 48800 ±  5488

⇒ 48800 -  5488, 48800 +  5488

⇒ ( 43312, 54288 )

Therefore, at 95%, confidence interval is ( $43312, $54288 )

You might be interested in
Please answer this question only if you know the answer! :(
Paul [167]

A is not a line of symmetry

3 0
3 years ago
Read 2 more answers
Joe is buying a jacket that originally costs $59.27 but is on sale for 10% off. Sales tax is 7%. What is the total cost of the j
postnew [5]
Hello!

10% off means there's a discount on the jacket, so we will be finding how much the discount is worth and then we'll subtract that from the original cost of the jacket. 
Sales tax is basically additional money added to the cost of an item, so we will find what the sales tax is on this and then add that to the cost.

59.27 * 10% = 5.927

59.27 - 5.927 = 53.343

Now, find and add the sales tax. 

53.343 * 7% = 3.73401

53.343 + 3.73401 = 57.07701

Round this to 57.1

The total cost of the jacket is $57.1.
7 0
3 years ago
Read 2 more answers
Help pls itS BEEN 2 HOURS LUV U <3
nataly862011 [7]

Step-by-step explanation:

Hey there!

The equation of a circle which passes through any point having centre (h,k) is;

( {x - h)}^{2}  + ( {y - k)}^{2}  =  {r}^{2}

In first blank ( x-_ ) keep "-2". In second blank (y - _ ) keep "4" and in last blank ( _ ) keep "36".

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em>

7 0
3 years ago
The coefficient of 8 · 2N is _____.
SSSSS [86.1K]
I believe the answer you are looking for is 2.
6 0
3 years ago
Read 2 more answers
HELP HURRY
WINSTONCH [101]
The first option is the answer, it is going from P to Q so the only logical answer would be the first choice
7 0
3 years ago
Other questions:
  • evelyn rode her horse along a triangular path. The distance she traveled south was 5 times the distance she traveled east. Then
    12·1 answer
  • Country A produces eight times the amount of diamonds in carats produced in country B. If the total produced in both countries i
    14·1 answer
  • Which statement is true about the polynomial
    9·2 answers
  • Could -2 be used as a base to rewrite 32? 64? why or why not ?
    5·1 answer
  • Please help! If possible, please word your explanation simply.
    11·2 answers
  • A triangle has angle measures 23degrees and 35 degrees. what is the measure of the third triangle
    12·1 answer
  • 8,25,42,,<br> Sequence find the 82nd term
    11·1 answer
  • The ratio 3 to 4 or 3/4 or 3:4 represents which percent?<br> a 75%<br> b 80%<br> c 50%<br> d 45%
    6·2 answers
  • Maya has some books she gives away 26 now she has 36 how many did she start with?​
    6·1 answer
  • Find the number if:
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!