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
mafiozo [28]
3 years ago
10

Which of the following situations calls for a hypothesis test about a population mean?

Mathematics
1 answer:
tigry1 [53]3 years ago
3 0

Answer:

Step-by-step explanation:

Hypothesis test about a population mean is done to evaluate two exclusive statements about a population in order to determine which is best supported by the sample data.

From the situations given, the correct options are

b. A recent study estimated that 20% of all college students in the United States smoke. The head of Health Services at Goodheart University suspects that the proportion of smokers may be lower there. This would require taking a sample and determining the probability of success.

c. A certain prescription allergy medicine is suppose to contain an average of 245 parts per million (ppm) of active ingredient. The manufacturer wants to check whether the mean concentration in a large shipment of pills is 245 ppm or not.

d. A report on the College Board website stated that in 2003 males scored generally higher than females on the SAT exam. An educational researcher wants to check whether this is true in her school district.

You might be interested in
John Calipari, head basketball coach for the 2012 national champion University of Kentucky Wildcats, is the highest paid coach i
MrRissso [65]

Answer:

A) sample mean = $1.36 million

B) standard deviation = $0.9189 million

C) confidence interval = ($1.93 million , $0.79 million)

*since the sample size is very small, the confidence interval is not valid.

Step-by-step explanation:

samples:

  1. $2.7 million
  2. $2.4 million
  3. $2.2 million
  4. $2 million
  5. $1.5 million
  6. $1.5 million
  7. $0.5 million
  8. $0.5 million
  9. $0.2 million
  10. $0.1 million

sample mean = $1.36 million

the standard deviation:

  • $2.7 million - $1.36 million = 1.34² = 1.7956
  • $2.4 million - $1.36 million = 1.04² = 1.0816
  • $2.2 million - $1.36 million = 0.84² = 0.7056
  • $2 million - $1.36 million = 0.64² = 0.4096
  • $1.5 million - $1.36 million = 0.14² = 0.0196
  • $1.5 million - $1.36 million = 0.14² = 0.0196
  • $0.5 million - $1.36 million = -0.86² = 0.7396
  • $0.5 million - $1.36 million = -0.86² = 0.7396
  • $0.2 million - $1.36 million = -1.16² = 1.3456
  • $0.1 million - $1.36 million = -1.26² = 1.5876
  • total $8.444 million / 10 = $0.8444 million

standard deviation = √0.8444 = 0.9189

95% confidence interval = mean +/- 1.96 standard deviations/√n:

$1.36 million + [(1.96 x $0.9189 million)/√10] = $1.36 million + $0.57 million = $1.93 million

$1.36 million - $0.57 million = $0.79 million

7 0
3 years ago
Write the inverse of h(x) = log7 x H -1(x) = x 7 H -1(x) = 7y H -1(x) = 7x
DerKrebs [107]

Answer:

HMMM this? im not sure i hope this will help... Solve the equation: 7x 9 x x 7. ... 7. Graph the linear system and estimate the solution. x + y = 4 x y = 8 (, ) 4. Write the slope-intercept form of the line that passes through the point (5, 5) and has ... x. Find h(g()). 4 ... Simplify the given expression.xy(xy 5xy 7y ) 6x y 4 0x y 4xy 6x y 4 5xy 7y 6x y 4 5x y 7x y d. ... B 5. x log7 log4 5.

Step-by-step explanation:

3 0
3 years ago
A watering can dispenses water at a rate of 0.40 gallon per minute. the original volume of water in the can was 10 gallons. whic
kondor19780726 [428]
The last one. because you are starting 1sec after the can has begun to pour. So, (1, 9.60) and the subsequent ordered pairs are correct
8 0
3 years ago
Read 2 more answers
Find the mean (average) of each set of numbers. Round your answer to the nearest tenth 12 18 5 8 15 2 9 17 1
umka2103 [35]

Answer: 9.7

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The science fair judges will be science and volunteers each judge will only have time to view 5 projects there are 133 science t
antiseptic1488 [7]
5 times amount of people has to be bigger than 2112

5(133+v)≥2112
distribute
665+5v≥2112
minus 665 from both sides
5v≥1447
divide both sides by 5
v≥289.4
yo can't have 0.4 volunterer
v≥290

has to have at least 290 volunteers
8 0
3 years ago
Other questions:
  • Y= X-2<br> y = x2 - 5x+ 6
    10·1 answer
  • The largest butterfly in the world is found in Papua,New Guinea.The female butterfly of the species weighs about 9/10 ounce.Use
    10·1 answer
  • Pam has 3 4/5 cups of milk. She wants to make muffins and needs 2/3 of a cup of milk for each batch. How many batches of muffins
    7·1 answer
  • What is the 45th multiple of 80
    14·1 answer
  • Lisa lit a candle with a height of 8 inches. When lit, this candle loses 10% of its original
    5·1 answer
  • Find EG
    12·1 answer
  • HELPPPPPPPPPPPPPPPPPPPPPPP
    10·2 answers
  • Please please please help brooo :(((
    5·1 answer
  • BRAINIEST IF CORRECT
    6·1 answer
  • Brett spent $25 for a tennis racket and pays $5 each time she plays a game.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!