HELP ASAP PLS ANSWER THE QUESTION IN THE PIC I GIV BRAINLEST AND LOTS OF POINTS TO CORRECT ANSWER
Answers
The answer could be either
C or B
Related Questions
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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a)
The test statistics is χ² = 8.31
b)
The critical value is 6.251.
c)
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,
a.
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
b.
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.
c.
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,
a)
The test statistics is χ² = 8.31
b)
The critical value is 6.251.
c)
We reject the null hypothesis that the expected distribution is accurate.
Learn more about hypothesis testing here:
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please someone help me, ill give brainiest pls just help me its my last question on math:
Which comparison is correct?
1 2 3 or 4
1. 7 < 3
2. -2 > -7
3. -9 > 4
4. -6 > -5
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Answer:
2. -2> -7 ...............
A. one solution
B. infinitely many solutions
C. no solution
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whats the slope of the line shown???
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Answer:
1 over 2 or 1 half, you can use rise(y value) over run(x value)
Find the volume........
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Answer:
765
Step-by-step explanation:
1/4 xbxaxh
0.5 x 17 x5 x 18
Which equals to 765
Answer:
18X17X5X.5=765
i think
Step-by-step explanation:
all you do is X all the sides and then add a *.5
Which equation represents 7/3 ? Select all that apply.
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3x(x + 2) and 6x(2x-3)
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Answer:
3x^2+6x and 12x^2-18x
Step-by-step explanation:
First explantanation : 3x time x is 3x^2 and 3x time is 2 is 6x . 2nd explantanation : 6x time 2 is 12x^2 and 6x time -3 is -18x .
If C is the incenter of ∆AMD, m∠A M C = 3 x + 6 and m∠ DMC= 8 x − 49.
find ∠ M A D (just numbers, no degrees signs).
Answers
Hope this will help you lot.
Answer:
<MAD=66
Step-by-step explanation:
to find x:
8x-49=3x+6
x=11
to find DMC:
8(11)-49
<DMC=39
<ADM=36
to find ADC:
36/2
<ADC=18
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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What is the equation of the line in slope-intercept form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.
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Answer:
y = -3/2x - 2
y int is -2
x int is -3/2
what is the volume of this composite solid
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Answer:
C
Step-by-step explanation:
198 cubic meters
Ms. Gittens went out to dinner and the total bill was $60. She wants to give the waiter a %20 tip. How much money should Ms. Gittens give the waiter for a tip?
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Answer:
$12
Step-by-step explanation:
20% of 60 = 12
Answer:
12 .....20% of 60 is = 12
Step-by-step explanation:
solve for x:x - 14 < - 23
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Answer:
Step-by-step explanation:
x - 14 < -23
x < -9
Can someone help having trouble solving this question
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Answer:
114
Step-by-step explanation:
to get the degrees of hexagon u should know first the greatest degree so you can subtract the others from it and how to get that
by this formula (no of sides-2)*180
(6-2)*180=720
so 138+128+120+160+90=606
and the remaining angle should be 720-606
which is 114
A car travels 56 miles in 3.5 hours.
a. What is the unit rate?
b. How long will it take the car to travel 120 miles?
c. How far will the car travel in 6 hours?
Answers
B = 7.5 hours
C = 96 miles
Step by step explanation:
A: If the car travels 56 miles in 3.5 hours you divide the 56 miles by the 3.5 hours and then you will get your unit rate of 16 miles per hour.
B: Now that you know that your unit rate is 16 miles per hour you can figure out how long it will take the car to travel 120 miles. To find this answer all you have to do is divided the amount the car traveled, 120 miles, by the unit rate, 16 miles per hour. After doing the division you will get your answer of 7.5 hours/ 7 hrs and 30 mins.
C: This one is pretty simple. All you have to do is take your unit rate of 16 and multiply it by the 6 hours. After doing your multiplication you will get your answer of 96 miles.
I hope you understand and this answered all of your questions. :)
With a measurement question built on a multiple rating list scale, ____. participants rate multiple items on a three-point scale the participant is restricted to circling their rating. the data generated are always ordinal None of the above is correct. it is possible to visualize the results better than with other numerical scales.
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Answer:
it is possible to visualize the results better than with other numerical scales
Step-by-step explanation:
A rating scale is been set up extract information concerning quantitative as well qualitative attribute.
A rating scale can be regarded as
method of data collection devices in collection of comparative information about as regards a specific research subject. It do comes in form of a multiple-choice question so that values could be assigned to a product by survey respondents. multiple rating list scale gives a better and broad results and give better chance in visualizing the gotten result compare with numerical scales( numerical scale are scales that gives quantitative symbolization as regards attribute).
It should be noted that With a measurement question built on a multiple rating list scale it is possible to visualize the results better than with other numerical scales
If each person uses 70 gallons of water per day, how many gallons will 57 people use in a day?
Answers
3990
Step-by-step explanation:
57*70=3990
On a coordinate plane, triangles A B C and D E F are shown. Triangle A B C has points (negative 10, negative 10), (negative 10, negative 4), and (4, negative 10). Triangle D E F has points (0, 8), (12, 4), and (5, 0). Which statement is true of the right triangles ABC and DEF? Area of ABC is greater than area of DEF. Area of ABC is less than area of DEF. Area of ABC is equal to the area of DEF. There is not enough information to compare the areas of triangles ABC and DEF.
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Answer:
Area of ABC is greater than area of DEF
Step-by-step explanation:
Answer:
A. Area of ABC is greater than area of DEF.
How many 1/5s are in 1?
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Answer:
5!
Step-by-step explanation:
. If the circumference of a circle is 20π inches long what is the measure of the diameter in inches?
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Answer:
d≈6.37
Step-by-step explanation:
Which graph represents a function?
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Answer:
the bottom graph in the first photo
Step-by-step explanation:
it is a function, unlike the others, because that graph is the only one where the x values dont repeat. in order for it to be a function, the x values cannot repeat
If I have 10 apples, 3 oranges and 7 pears how may oranges do i have?
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Answer:
20 oranges.
Step-by-step explanation:
If you add 10 and 3 that gives you 13,
now add the 7 and that should give you 20.
URGENT
Solve each triangle. Show work.
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Answer:
Multiply the 27 yd × 30 yd then after the other one do the same thing but after All divide it by 17
Can you please help me
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9514 1404 393
Answer:
volume: 200 cm³surface area: 220 cm²Step-by-step explanation:
The usual formulas are useful for this.
V = LWH
V = (10 cm)(4 cm)(5 cm) = 200 cm³
The volume is 200 cubic centimeters.
__
SA = 2(LW +H(L +W))
SA = 2((10 cm)(4 cm) +(5 cm)(10 cm +4 cm)) = 2(40 +5(14)) cm² = 220 cm²
The surface area is 220 square centimeters.
Which of the following is an equation?
A. ʸ⁄₉ - 3
B. ʸ⁄₉ = 3
C. 9 - 3
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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.
Evaluate the following expression.
3 to power of 1
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Answer:
3
Step-by-step explanation:
it is 3 3x1 is 3
what is the answer to 5 + 5
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Answer:
10
Step-by-step explanation:
Let h(x)=|2x|-4. Find h(x) when x = -7.
a)-10
b) 10
c) -13
d) 13
Plzzz
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Solve for t. t + -24 = -29 -8
what is t value?
Answers
Hope this helps
Step-by-step explanation:
t-24= -37
t= -34+24
t= -13
Answer:
t = -13
Step-by-step explanation:
Add or subtract the numbers
t- 24 = - 37t−24=−37
Separate the constants and variables
t = - 37 + 24t=−37+24
Add or subtract the numbers
t = - 13t