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
Kryger [21]
3 years ago
6

A market research company wishes to know how many energy drinks adults drink each week. They want to construct a 80% confidence

interval for the mean and are assuming that the population standard deviation for the number of energy drinks consumed each week is 0.9. The study found that for a sample of 164 adults the mean number of energy drinks consumed per week is 7.9. Construct the desired confidence interval. Round your answers to one decimal place.
Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
7 0

Answer:

The confidence interval = (7.8 , 8.0)

Step-by-step explanation:

Confidence Interval formula =

Mean ± z × Standard deviation/√n

Mean = 7.9

Standard deviation = 0.9

n = number of samples = 164

z = z score of an 80% confidence interval = 1.282

Confidence Interval = 7.9 ± 1.282 × 0.9/√164

= 7.9 ± 0.0900966432

Confidence Interval

= 7.9 - 0.0900966432

= 7.8099033568

Approximately to 1 decimal place = 7.8

7.9 + 0.0900966432

= 7.9900966432

Approximately to 1 decimal place = 8.0

Therefore, the confidence interval = (7.8 , 8.0)

You might be interested in
Absolute value function with no x-intercepts
Kitty [74]

Answer:

y = |x| + 1

Step-by-step explanation:

1 can be anything greater than 0

5 0
1 year ago
Which is the only number that is GREATER than 1/2?
jek_recluse [69]

Answer:

A. 40/100

Step-by-step explanation:

Speech is human vocal communication using language. Each language uses phonetic combinations of vowel and consonant sounds that form the sound of its words (that is, all English words sound different from all French words, even if they are the same word, e.g., "role" or "hotel"), and using those words in their semantic character as words in the lexicon of a language according to the syntactic constraints that govern lexical words' function in a sentence. In speaking, speakers perform many different intentional speech acts, e.g., informing, declaring, asking, persuading, directing, and can use enunciation, intonation, degrees of loudness, tempo, and other non-representational or paralinguistic aspects of vocalization to convey meaning. In their speech speakers also unintentionally communicate many aspects of their social position such as sex, age, place of origin (through accent), physical states (alertness and sleepiness, vigor or weakness, health or illness), psychic states (emotions or moods), physico-psychic states (sobriety or drunkenness, normal consciousness and trance states), education or experience, and the like.

6 0
3 years ago
Read 2 more answers
A smoothie recipe calls for 3 cups of soy milk, 2 frozen bananas and, 1 tablespoon of chocolate syrup. Write a sentence that use
anyanavicka [17]

Answer:

3:2:1

Step-by-step explanation:

4 0
3 years ago
Can anyone help and show work
Romashka [77]

Answer:

x=88⁰

Step-by-step explanation:

Since the value of that angle is 44⁰ and the angle is located on the circle, the measure of the arch x is twice the angle value.

So x=2×44⁰=88⁰

8 0
3 years ago
Read 2 more answers
How many real number solutions are there to the equation y=-5x^2+8x-7
olga55 [171]
There are no real solutions
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which is the simplified form of ((2^-2)(3^4))^-3*((2^-3)(3^2))^2
    9·1 answer
  • Harper has $15.00 to spend at the grocery store. She is going to buy bags of fruit that cost $4.75 each and one box of crackers
    5·1 answer
  • 79543 divided by 901
    15·1 answer
  • Convert the following repeating decimal to fractions 0.123232323...
    12·1 answer
  • Write an equation of a line that has a slope of 5 and goes through the point (-8, 35)?
    15·1 answer
  • Solve for t. d= -16t^2 + 12
    14·1 answer
  • A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the
    9·1 answer
  • 150 students in hostel have food enough for 45 days. After 10 days , 25 students leave the hostel. How much larger will the food
    6·1 answer
  • (A) x^2 + 6x + 9 = 0<br><br><br> (B) 8x^2+ 5x - 6 = 0<br><br><br> (C) (x + 4)^2 - 36 = 0
    15·2 answers
  • 4. Find the value of x.<br> (4x - 10)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!