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
11Alexandr11 [23.1K]
3 years ago
10

6. A car dealership would like to estimate the mean mpg of its new model car with 90% confidence. The population is normally dis

tributed; however we are taking a sample of 25 cars with a sample mean of 96.52 and a sample standard deviation of 10.70. Calculate a 90% confidence interval for the population mean using this sample data.
Mathematics
1 answer:
Yakvenalex [24]3 years ago
4 0

Answer:

92.9997<\mu<99.5203

Step-by-step explanation:

Using the formula for calculating the confidence interval expressed as:

CI = xbar ± Z * S/√n where;

xbar is the sample mean

Z is the z-score at 90% confidence interval

S is the sample standard deviation

n is the sample size

Given parameters

xbar = 96.52

Z at 90% CI = 1.645

S = 10.70.

n = 25

Required

90% confidence interval for the population mean using the sample data.

Substituting the given parameters into the formula, we will have;

CI = 96.52 ± (1.645 * 10.70/√25)

CI = 96.52 ± (1.645 * 10.70/5)

CI = 96.52 ± (1.645 * 2.14)

CI = 96.52 ± (3.5203)

CI = (96.52-3.5203, 96.52+3.5203)

CI = (92.9997, 99.5203)

<em>Hence a 90% confidence interval for the population mean using this sample data is 92.9997<</em>\mu<em><99.5203</em>

You might be interested in
Please help (picture)
givi [52]

A = 360 cm^2

Step-by-step explanation:

Using Pythagorean theorem, the length AB is given by

AB^2 = 17^2 - 8^2 = 225 cm^2

or

AB = 15 cm

Since the ratio BC: CD = 1:2 and BC = 8 cm, this means that CD = 2×(8 cm) = 16 cm

so the length BD is

BD = BC + CD = 8cm + 16 cm = 24 cm

There the area of the rectangle is

A = AB×BD

= 15cm×24cm

= 360 cm^2

3 0
2 years ago
Read 2 more answers
Neeeedhelp asap !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
slavikrds [6]

Answer:

1. $0.24

2. 89.2 miles

Step-by-step explanation:

To get the unit price, divide the total price by the amount that was purchased.

1. 3.12/13 = $0.24

For the second one, get the distance traveled per hour first then multiply by 8.

22.3 / 2 = 11.15

11.15 x 8 = 89.2

6 0
2 years ago
Simplify the expression <br> 9y+4-6y
Mashutka [201]

Answer:

3y+4

Step-by-step explanation:

9y-6y=3y

3 0
2 years ago
I NEED HELP. What is the answer?
Lina20 [59]

Answer:

B

Step-by-step explanation:

Here’s what B has:

Min: 24

Q1: 27

Median: 31

Q3: 33

Max: 34

Although Choice A and B were really close with their five number summaries, out of the two of them, only B had a maximum value of 34, like the one in the box plot shown above.

7 0
2 years ago
Which data set contains an outlier?
Bezzdna [24]

The data set which contains an outlier from the given answer choices is; Choice D; {16, 42, 45, 45, 46, 48}.

<h3>What is an outlier?</h3>

An outlier in a set of data values is a data value which differs significantly from other data points and hence, tends to affect the mean of such set of data values significantly.

On this note, choice D is the set of data values which contains an outlier.

Read more on outliers;

brainly.com/question/2749543

#SPJ1

4 0
2 years ago
Other questions:
  • The circumference of earth’s moon is about 1091500000 cm. Write this number in scientific notation
    9·1 answer
  • Find the domain of the function…. f(x) = 16x + 6
    7·1 answer
  • I don't quite get this.
    6·2 answers
  • What is the quotient of 6 divided by 3/4
    8·2 answers
  • The volume of a cylinder is 24 cubic feet. What is the volume of a cone having the same base and same height?
    14·1 answer
  • Which of the following polygons can form a regular tessellation?
    5·1 answer
  • Someone plz help me Idk what to do idk which answer It is I’ll give brainlist and points
    15·2 answers
  • 5. Find the slope of the line through the given points.<br> (10, 4), (4, 15)
    13·1 answer
  • Please help! -The volume inside a rectangular storage room is 2,052 cubic feet. The room is 9 feet high. Find the area of the fl
    6·2 answers
  • Scientists have increased their ability to make observations beyond their own senses through the invention of specialized equipm
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!