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
WARRIOR [948]
3 years ago
10

The office of student services at a large western state university maintains information on the study habits of its full-time st

udents. their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. the hours studied follows the normal distribution with a standard deviation of six hours. suppose we select a random sample of 144 current students. what is the probability that the mean of this sample is less than 19.25 hours? g

Mathematics
1 answer:
solong [7]3 years ago
4 0

A suitable probability calculator can tell you the probability is about 6.7%.


_____

The standard deviation of the distribution of sample means is the population standard deviation (6) divided by the square root of the sample size (√144=12). Thus, your threshold is about (19.25-20)/(6/12) = -1.5 standard deviations from the mean.

You might be interested in
Put these in order from least to greatest kilometer,millimeter,inches,yards,centimeter,miles,meter
Dafna11 [192]
<span>centimeter, inch, yard, meter, kilometer, mile</span>
7 0
3 years ago
What is the slope and y intercept of 6x + 24 =0
yuradex [85]
X = -4 is your answer
6 0
3 years ago
NEED HELP ASAP
Archy [21]
I think its c your welcome

7 0
3 years ago
Read 2 more answers
Which prediction can you make based on this graph?
Colt1911 [192]

Answer:more people will be living in Africa than in Asia sometime around 2120

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
How many gallons are equal to 27.3 hectoliters?​
Mandarinka [93]

Answer:

721.19 gallons

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the answer for 12 over 75 (fraction)
    7·1 answer
  • Three-fourths of a number increased by one-half is equal to fourteen. Find the number.
    15·2 answers
  • X+ 7 = 7find the slope ​
    12·1 answer
  • A research organization wanted to estimate the average number of hours a college student sleeps per night during the school year
    11·1 answer
  • A dance group from Round Rock High School is fundraising to travel to a competition. The competition entry fee is only $300 for
    9·1 answer
  • Bob has a coin cup with four $1 tokens and two $5 tokens in it. He also has two $10 tokens and one $25 token in his pocket. He
    7·2 answers
  • In your own words, explain what a rational expression is and give and example of one.
    8·1 answer
  • a shop is having a sale all items are reduced by 30% work out the sale price of an item normally priced at £110
    14·2 answers
  • Need some help, please. :)
    7·1 answer
  • What is the common factor among xy2 and x2y ?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!