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
9

A 95% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A prelimina

ry sample standard deviation is 3.8. The smallest sample size n that provides the desired accuracy is
Mathematics
1 answer:
serious [3.7K]3 years ago
7 0

Answer:

Sample size should be atleast 617

Step-by-step explanation:

given that a 95% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit.

i.e. margin of error <0.3

Std devition sample = 3.8

For 95% assuming sample size large we can use z critical value

Z critical = 1.96

we have

1.96 * std error 616.3634

Sample size should be atleast 617 to get an accurate margin of error 0.3

You might be interested in
HELP PLS’ Suppose you roll a die. Find the probability of the given event. Simplify your answer.
NikAS [45]

The answer is 2) 2/3

7 0
3 years ago
At the gift shop, they sell small greeting cards and large greeting cards. The cost of a small greeting card is $1.60 and the co
erik [133]
<h2>Explanations:</h2>

From the given question, we have the following parameters

Cost of a small greeting card = $1.60

The cost of a large greeting card = $4.05.

Cost of 5 small greeting cards = 5(1.60)

Cost of 5 small greeting cards = $8.00

Cost of 4 large greeting cards = 4(4.05)

Cost of 4 large greeting cards = $16.2

Cost of 5 small and 4 large = $8.00 + $16.2

Cost of 5 small and 4 large $24.2

Hence it would cost $24.2 to get 5 small greeting cards and 4 large greeting cards

Similarly;

Cost of x small greeting cards = 1.60x

Cost of y large greeting cards = 4.05y

Cost of small greeting cards and y large greeting cards = 1.60x + 4.05y

Hence it would cost $(1.60x + 4.05y) to get x small greeting cards and y large greeting cards

5 0
1 year ago
Which expression gives the same result as shown problem?
sineoko [7]
The first choice gives you the same result. The factor of 5 can be removed to the outside of the summation symbol.

5\sum\limits_{i=0}^{4}{\left(\dfrac{1}{3}\right)^{i}}
8 0
3 years ago
The double number lines show the ratio of minutes to days.<br> How many minutes are in 2 days?
cluponka [151]
2880 minutes in 2 days
8 0
3 years ago
Read 2 more answers
Jessica had two hundred six dollars to spend on eight books. AFter buying them she ha fourteen dollars. How much did each book c
frutty [35]
Each book costs $24.

206-14=192
192/8=24
8 0
3 years ago
Other questions:
  • Which is closest to the circumference of the CD?
    13·2 answers
  • I will give crown to the best answe PLEASE HELP ME!!!!!
    5·2 answers
  • Break apart strategy for 518+372=
    8·1 answer
  • Compare 2/5 and 1/10 use common denominator
    12·1 answer
  • The spring of a spring balance is 6.0 in. long when there is no weight on the balance, and it is 8.3 in. long with 9.0 lb hung f
    6·1 answer
  • "A drawer has some red, green, and blue marbles. There are 33 marbles.
    9·1 answer
  • How am I supposed to do this please help me
    13·2 answers
  • Three people split an amount of money. 1 268 dollars and 1 gets 200 dollars. The third gets 40 percent. What is the amount?
    8·1 answer
  • students for A High School football games in bleachers along one side of the field altogether the bleachers seat 1152 students i
    14·2 answers
  • Suppose that, in the past, 40% of all adults favored capital punishment. Do we have reason to believe that the proportion of adu
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!