Resources

Testimonials

Plans

Resources

Testimonials

Plans

AI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Wears contact lenses Does not wear contact lenses Wears glasses $9$ $63$ Does not wear glasses $2$ $26$ The table shows the number of people who wear glasses, contact lenses, both, or neither, in a random sample of $100$ Amercican adults. According to the table, how many people in the random sample do not wear contact lenses?

View step-by-step help

Home

Math Problems

Precalculus

Interpret confidence intervals for population means

Full solution

Just a sec, we’re working out the solution to your problem...

More problems from Interpret confidence intervals for population means

Question

Based on random samples of river heights, oceanographers estimate that

4

800

cubic kilometers

\left(\mathrm{km}^{3}\right)

of freshwater is discharged into the Arctic Ocean annually. The estimate has a margin of error of

240 \mathrm{~km}^{3}

at the

90 \%

confidence level. Which of the following is the most reasonable claim about the volume of freshwater discharged annually into the Arctic Ocean?

\newline

Choose

1

answer:

\newline

A) It is between

4

800

and

5,040 \mathrm{~km}^{3}

\newline

B) It is between

4

560

and

5,040 \mathrm{~km}^{3}

\newline

240

and

4,800 \mathrm{~km}^{3}

\newline

(D) It is between

240

and

4,320 \mathrm{~km}^{3}

Get tutor help

Posted 10 months ago

Question

A random sample of international flights in

2013

showed that

79 \%

of the flights arrived within

15

minutes of their scheduled arrival time, and this estimate had a margin of error of

3 \%

at a

95 \%

confidence level. Which of the following conclusions is best?

\newline

Choose

1

answer:

\newline

(A) Exactly

79 \%

arrived within

15

minutes of their scheduled times.

\newline

(B) Exactly

76 \%

arrived within

15

minutes of their scheduled times.

\newline

76 \%

and

82 \%

arrived within

15

minutes of their scheduled times.

\newline

(D) Between

92 \%

and

98 \%

arrived within

15

minutes of their scheduled times.

Get tutor help

Posted 10 months ago

Question

A food reporter conducted a survey to determine whether people in a certain city like the new dessert created by Chef Domenica. The reporter asked

87

people who were waiting in line outside of Chef Domenica's bakery on a Tuesday, and

9

people refused to respond. Which of the following factors makes it least likely that a reliable conclusion can be drawn about whether people in the city like Chef Domenica's new dessert?

\newline

Choose

1

answer:

\newline

(A) Sample size

\newline

(B) Population size

\newline

\newline

(D) The number of people who refused to respond

Get tutor help

Posted 9 months ago

Question

The members of a city council wanted to know the opinions of all city residents about collaborating with local farms to set up a farmers market in the city square. The council surveyed a sample of

300

city residents who have purchased produce from local farms. The survey showed that the majority of those sampled were in favor of the farmers market. Which of the following is true about the city council's survey?

\newline

Choose

1

answer:

\newline

A It shows that the majority of city residents are in favor of the farmers market.

\newline

(B) The survey sample is biased because it is not representative of all city residents.

\newline

\newline

(D) The survey should have consisted entirely of farmers.

Get tutor help

Posted 9 months ago

Question

Articles in the American Sociology Review Year

\quad

Total number of articles

\quad

Percent that were quantitative The table summarizes the numbers of articles published in the American Sociology Review in two years. Quantitative articles use numerical data and statistics. How many more quantitative articles were published in the journal in

\quad

than in

\quad

? Round to the nearest article.

Get tutor help

Posted 8 months ago

Question

When Famke charges her phone, it gains

2

percentage points each minute. When Famke uses her phone, it loses

5

percentage points each minute.

\newline

Once, Famke used her phone for some time, and then charged it for twice the amount of time she used it. In the end, her phone lost

10

percentage points.

\newline

How long did Famke use her phone and how long did she charge it?

\newline

Choose

1

answer:

\newline

(A) There is not enough information to determine the exact time Famke used and charged her phone.

\newline

(B) The given information describes an impossible situation.

\newline

10

minutes, and charged her phone for

20

minutes.

\newline

(D) Famke used her phone for

20

minutes, and charged her phone for

10

minutes.

Get tutor help

Posted 8 months ago

Question

We've updated our Cookie Notice. Please review it now.

\newline

Courses

\newline

\newline

Khan Academy

\newline

Donate

\newline

C^(**)

\newline

knapke.jace

\newline

My assignments

\newline

Unit test

\newline

6

th grade

\newline

Graph

\newline

x \geq -5

\newline

COURSE:

6

TH GRADE > UNIT

7

\newline

Unit test

\newline

Unit test

\newline

Equations & inequalities

\newline

＂ Math ＂ > ＂

6

th grade ＂ > ＂ Equations \& ＂

\newline

＂ inequalities ＂ > ＂ Unit test ＂

\newline

2024

Khan Academy

\newline

Terms ofuse PrivacyPolicy Cookie Notice

\newline

Hide

\newline

Drag the circle to values on the number line.

\newline

Use the buttons to switch arrow directions and to make the circle open or filled.

\newline

Report a problem

Get tutor help

Posted 8 months ago

Question

It always takes Zach approximately

5

minutes longer to arrive than he says. If Zach says he will arrive in

x

minutes, which of the following functions correctly models the approximate number of minutes it actually takes Zach to arrive?

Get tutor help

Posted 8 months ago

Question

One marketing professional recommends that businesses budget between

12\%

and

16\%

of their monthly gross sales for rent. If a business earns

\$540,000

in gross sales per year, how many dollars would the adviser recommend as the maximum budget for rent each month?

Get tutor help

Posted 8 months ago

Question

A manager at the Mega Raisin Cereal company wants to confirm that there is an acceptable number of raisins in the company's family-sized boxes. He counted the number of raisins in

100

randomly sampled boxes from the Mega Raisin factory. From the collected data, he computed a

90\%

confidence interval of for the mean number of raisins in family-sized boxes of Mega Raisin Cereal.

\newline

Is the following conclusion valid?

\newline

100

more samples are taken (with elements chosen randomly and independently), it is expected that exactly

100

of them will each produce a

90\%

confidence interval that contains its sample mean.

\newline

Choices:

\newline

(A)yes

\newline

(B)no

\newline

Get tutor help

Posted 7 months ago

View all (40)