Mathematics College

A survey of 137 randomly selected students at one college showed that only 86 checked their campus email account on a regular basis. Construct a 98% confidence interval for the percentage of students at the college who do not check their email account on a regular basis. Round to one decimal place.

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Answer 1

Answer:

2 %

Step-by-step explanation:

Related Questions

I don’t understand, can someone help ?

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Answer:

d. tan (35) = [tex]\frac{x}{10}[/tex]

Step-by-step explanation:

You must memorize the definitions of all the trig functions.

Tan of an angle = opposite side/adjacent side

In your case, the opposite side of the 35° angle is x and the adjacent side of the 35° angle is 10

So, tan 35 = x/10

3
1

+a=
4
5
mmmmmmmmmmmmmmmmmmmmmmmmm

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i'm confused, can you tell me the question?

Write the expanded form for each expression.

2(i + 5j)

-0.4(h - 1)

i(8 + 2h-6)

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Answer:

2i + 10j

-0.4h + 0.4

8i +2hi - 6i = 2i + 2hi

ryan climbed 100 steps in 50 seconds. How many steps did he climbed per second? Step by step. Show the full procedure.

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Well Ryan climbed at a speed of 100 steps per 50 seconds so if you take the steps which is a hundred and the time of 50 seconds and divide the two you will get a result of 2 steps per second.

A cube is numbered 1 through 6. If the cube is rolled twice, how many of the possible outcomes will have two
numbers?
O 3
O9
O18
O36

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Answer:

Step-by-step explanation:

The outcome could be any number 1 through 6.

Hope halps

If $6,000 is invested for 5 years with a 3.5% yearly interest rate, what is the amount of simple interest earned?

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Answer:

1,050

Step-by-step explanation:

Simple Interest = Principle×Rate×Time/100

=6,000×5×3.5/100

=1,050

please help 7th grade math

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Answer:

Step-by-step explanation:

The mode is the number that appears most in the data set.

8 appears twice while all the other only appear once.

help find the surface area

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Answer is above me. Have a good day.

Answer:

9yd

Step-by-step explanation:

Because you have to look at the sides.

Find the VOLUME of each prism. Round to the nearest tenth if necessary.
9 ft
11 ft
8 ft
Your answer

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Answer: 792

Step-by-step explanation:

9*8= 72

72*11= 792

Length* Height* Depth= Area

What value of x makes 2x - 7 = 13 true?

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Answer: x=10, is the correct answer.

Step-by-step explanation:

HELP ITS DUE IN 4 MINUTES

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Answer:

3rd choice

4th choice

1st choice

2nd choice

Suppose a pack of candy bars has 4 bars. Each bar weighs 3.38 ounces. How much does the pack weigh?

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Answer:

13.52 ounces I think...

Step-by-step explanation:

4x3.38 subtract the decimal and add it again...

What is the distance between (1, -1) and (-2,3) ?

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Answer:

the answer is 5

if I have five gallons of paint and I used 3/4 of the five gallons how much do I have left over

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Answer:

4.25

Step-by-step explanation:

5-3/4=4.25

I need help! I’m stuck on this problem!!

Jackie is five times as old as her son Elijah. The sum of their ages is 48. How old is Elijah?

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Answer:

Elijah is 8.

Step-by-step explanation:

8 x 5 = 40 (Jackie is 40)

40 + 8 is 48!

Answer:

97.9% sure its 8

Step-by-step explanation:

Find the volume of this figure.

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The answer is a because we don’t care

I NEED HELP ASAP!!! PLEASE HELP!!!

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Answer:

from B we get y = -2x + 2

part c: slope, m =-2 and b=2

Step-by-step explanation:

Yes this is correct ^^^^

Use the distributive property and mental math to find the product 5 x 49

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5x49=245 this is simple math

Answer: 5 x 49 = 245

what is -2.14285714 rounded to the nearest whole

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Answer:

-2

Step-by-step explanation:

A phone company plans on offering their new smartphone in four colours: white, black, silver and rose gold. They anticipate that 30% of shoppers will prefer white, 35% will prefer black, 20% will prefer silver and 15% will prefer rose gold. They perform market research by asking a random sample of 350 potential customers which colour they prefer.

Color White Black Silve Rose Gold
Frequency 99 135 89 27

Can the company conclude that their expected distribution was accurate using a 10% level of significance?

a. Calculate the test statistic.
b. Determine the critical value(s) for the hypothesis test.
c. Conclude whether to reject the null hypothesis or not based on the test

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COLOR I need help with this qeustion also pls tell me when u get the answer

The test statistics is χ² = 8.31

The critical value is 6.251.

We reject the null hypothesis that the expected distribution is accurate.

What is hypothesis testing?

Hypothesis testing is a statistical method that is used to make decisions about a population based on a sample of data.

It involves testing a null hypothesis (H0) against an alternative hypothesis (Ha) using statistical techniques.

We have,

To test whether the expected distribution was accurate, we need to perform a chi-square goodness-of-fit test.

The null hypothesis is that the expected distribution is accurate, and the alternative hypothesis is that it is not accurate.

The expected frequencies are:

Color:

White Black Silver Rose Gold

105 122.5 70 52.5

i.e

Expected Freq:

0.3 x 350 = 105

0.35 x 350 = 122.5

0.2 x 350 = 70

0.15 x 350 = 52.5

Using the formula for the chi-square goodness-of-fit test statistic:

χ² = ∑ (Observed Frequency - Expected Frequency)² / Expected Frequency

χ² = [(99-105)²/105] + [(135-122.5)²/122.5] + [(89-70)²/70] + [(27-52.5)²/52.5]

χ² = 8.31

The critical value for the chi-square test with 3 degrees of freedom (4 categories - 1) and a significance level of 0.10 is 6.251.

Since the calculated test statistic (8.31) is greater than the critical value (6.251), we reject the null hypothesis that the expected distribution is accurate.

Therefore, the company cannot conclude that their expected distribution was accurate using a 10% level of significance.

Thus,

The test statistics is χ² = 8.31

The critical value is 6.251.

We reject the null hypothesis that the expected distribution is accurate.

Learn more about hypothesis testing here:

https://brainly.com/question/30588452

#SPJ2

PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEE HELP ME. IF I PASS THIS I GET TO GO TO DISNEY WORLD.

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Answer:

I think it would be C

Step-by-step explanation:

The answer is 2.
If they are similar and the second triangle is half of the other one, then the answer is C!
Answer: C

What is the answer and quick

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Answer:

25%

Step-by-step explanation:

if you divide into five equal parts it’s going to be 20%

Let h(x)=|2x|-4. Find h(x) when x = -7.
a)-10
b) 10
c) -13
d) 13
Plzzz

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Maybe use math photo

Estimate the diameter of a circle with a circumference of 80 ft. Use 3.14 for pi

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Round your answer to the nearest hundredth if necessary. Estimate the diameter of a circle with a circumference of 80 feet.

Simplify 8 – 2(3x – 36) + 4x
A. 22x - 216
B. -2x – 288
C. -2x + 80
D. X + 900

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Answer:

C. -2x + 80

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Distributive Property

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

8 - 2(3x - 36) + 4x

Step 2: Simplify

[Distributive Property] Distribute -2: 8 - 6x + 72 + 4x[Addition] Combine like terms (x): -2x + 8 + 72[Addition] Combine like terms (Z): -2x + 80

9 +10 =

please help

I will give brainliest and 5 star and 10 points for the best answer

Answers

What’s 9 + 10? 21 :(

Answer:

910

Step-by-step explanation:

just remove the plus sign (+) to get your answer :)

HELP I NEED HELP!!!

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hi! so what you want to do is first set up a proportion, if you know that the two triangles are congruent because abc~def you know that the proportion will work out. the proportion to set up is 54/72 from there you should know that 9 goes into both 72 and 54 so when you reduce you’d be left with 6/9 which you could further reduce to 2/3. then you can find the other sides by multiplying 92 by 2/3 and you’d get 61 and 84 by 2/3 where you’d get 56. However since you are supposed to find the perimeter, you would add all three sides together (54+56+61) and you’d be left with 171. hope this helps

if 2x+y=8 and x+2=5. what is the value of y?

Answers

Answer:

y=2

Step-by-step explanation:

x+2=5

x= 5-2

x= 3

2x+y=8

2×3+y=8

6+y=8

y=8-6

y=2

Answer:

y=2

Step-by-step explanation:

First solve x+2=5 to find x.

x+2=5

-2 -2

x=3. Substitute x=3 into 2x+y=8.

(2 x 3) + y = 8

Now solve.

6 + y = 8

-6 -6

y=2.

Hope I helped x

A (5,3) and B(3,-2) are two fixed points. Find the equation of the locus of P, so that the
area of triangle PAB is 9.

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Answer:

[tex]37=5x-2y,\,1=5x-2y[/tex]

Step-by-step explanation:

If [tex](x_1,y_1),\,(x_2,y_2),\,(x_3,y_3)[/tex] are coordinates of a triangle then area of a triangle is equal to [tex]\frac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)|[/tex]

Let point P be [tex](x,y)[/tex]

Put [tex](x_1,y_1)=(5,3),\,(x_2,y_2)=(3,-2),\,(x_3,y_3)=(x,y)[/tex]

Area of a triangle = [tex]\frac{1}{2}|5(-2-y)+3(y-3)+x(3+2)|[/tex]

[tex]=\frac{1}{2}|-10-5y+3y-9+5x|\\\\=\frac{1}{2}|-19+5x-2y|[/tex]

Also,

Area of a triangle = 9 square units

[tex]9=\frac{1}{2}|-19+5x-2y|\\\\18=|-19+5x-2y|[/tex]

±18 = -19 + 5x - 2y

[tex]18=-19+5x-2y,\,-18=-19+5x-2y\\\\37=5x-2y,\,1=5x-2y[/tex]

The ratio of green to white candles is 2:5. If there are 32 green candles, how many white candles are there?

Answers

Answer:

80?

Step-by-step explanation:

Answer:

80 white candles

Step-by-step explanation:

I use a way that makes it easy for me

2:5 means [tex]\frac{2}{5}[/tex]

so when you write [tex]\frac{2}{5} =[/tex][tex]\frac{32}{x}[/tex]

that means you do the cross multiplication method which makes the equation go that way:

[tex]2x=32*5[/tex]

[tex]2x=160\\x= 80[/tex]

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