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
katovenus [111]
3 years ago
12

A food snack manufacturer samples 15 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 10

.2 and the sample standard deviation is 0.25, find the 95% confidence interval of the true mean________.
A. (10.06, 10.34)B. (10.07, 10.33)D. (10.14, 10.26)
Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
6 0

Answer: the correct option is A

Step-by-step explanation:

We want to find 95% confidence interval for the mean of the weight of pretzels.

Number of samples. n = 15 bags

Mean, u = 10.2

Standard deviation, s = 0.25

We will use the t- test

Degree of freedom = n - 1 = 15 - 1= 14

Alpha, a = (1-confidence interval )/2

a = (1-0.95)/2 = 0.025

Looking at the t-distribution table, the corresponding z value is 2.131

Confidence interval = z × standard deviation/√n

Confidence interval = 2.131 × 0.25/√15

Confidence interval = 0.13755545851

Approximately 0.138

At 95% confidence interval,

The lower end is 10.2 - 0.138 = 10.062 Approximately 10.06

The upper end is 10.2 - 0.138 = 10.338. Approximately 10.34

You might be interested in
I could REALLY use some help on this.
pickupchik [31]
Picture of work attached.

5 0
3 years ago
Please answer this question !! Will give brainliest to the best answer and 30 points !!
sergey [27]

Hi,

Get knowledge *throw math book at brain*

8 x 8 x 8 is 512 so its not a or b, add that to 6 times 6 and it equals d 546,

Answered by Britton have a nice day:)

8 0
3 years ago
Read 2 more answers
the original price of a jacket is $68. The sale price is 30% off the original price. what is the amount off the original price?​
Semmy [17]

Answer: The original price of the jacket is given in the question and it is $68.

The percent of discount given on the original price is 30%.

Then

The amount of discount given = (68 * 30/100) dollar

                                                = 20.4 dollar

The discount amount is $20.4

Now after the deduction of the sale percentage, the selling price of the jacket can be easily deduced.

Then

Selling price of the jacket = (68 - 20.4) dollars

                                        = 47.6 dollars

Step-by-step explanation:

3 0
3 years ago
A yoga membership costs $16 and an additional $7 per class. write a linear equation modeling the cost of a yoga membership.
MrRissso [65]
Y=16x+7
the x represents the number of memberships the 16 represents the cost of a membership and the 7 represents the additional cost.
8 0
3 years ago
Read 2 more answers
A man invests his savings in two accounts ,one paying6% and the other paying 10% simple interest per year. He puts twice as much
AnnyKZ [126]

Answer: he invested $46062.5 at 6% and $23031.25 at 10%

Step-by-step explanation:

Let x represent the amount which he invested in the account paying 6% interest.

Let y represent the amount which he invested in the account paying 10% interest.

He puts twice as much in the lower-yielding account because it is less risky.. This means that

x = 2y

The formula for determining simple interest is expressed as

I = PRT/100

Considering the account paying 6% interest,

P = $x

T = 1 year

R = 6℅

I = (x × 6 × 1)/100 = 0.06x

Considering the account paying 10% interest,

P = $y

T = 1 year

R = 10℅

I = (y × 10 × 1)/100 = 0.1y

His annual interest is $7370dollars. it means that

0.06x + 0.2y = 7370 - - - - - - - - - -1

Substituting x = 2y into equation 1, it becomes

0.06 × 2y + 0.2y = 7370

0.12y + 0.2y = 7370

0.32y = 7370

y = 7370/0.32

y = $23031.25

x = 2 × 23031.25

x = 46062.5

6 0
3 years ago
Other questions:
  • what is a width of a rectangle prisim if the volume is 50046 cm 3 the hight is 7 cm and the llength is 13 cm
    11·1 answer
  • Helpppppppp please ugh
    11·2 answers
  • The blue dot is at what value on the number line?
    8·2 answers
  • What is simplify 18=10x-x
    15·1 answer
  • Use the communitve property to find the unknown number in the equation 35×70 =m×35
    6·2 answers
  • Which expression is equal to h, given the following formula?
    8·1 answer
  • Please give the right answer
    15·1 answer
  • The circumference of a hula hoop is 86\pi \text{ cm}86π cm86, pi, start text, space, c, m, end text.
    5·1 answer
  • PLS HELP ME!! THIS IS DUE TOMORROW
    15·1 answer
  • A recipe has a ratio of 1 1/2 cups of cheese to 6 oz. of pasta. Based on this recipe, which statement is true?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!