A researcher is interested in consumer preferences among three brands of yogurt. A sample of 90 people is obtained,
and each individual is asked to taste each brand and then select his/her favorite. The resulting frequency data are as
follows:
Brand A
Brand B Brand C
37
21
32
Do the data indicate any significant preferences among the three brands? Test at the .05 level of significance.
State the null hypothesis (1 point), the expected frequency for each category (3 points), the value of chi-
square (4 points), the df (1 points), the critical value of chi-square (2 points), and the decision regarding
significance (1 points).
Answer:
Step-by-step explanation:
From the given information:
The null hypothesis: all three brands are equally likely to their expected value
The alternative hypothesis: preferences exist among the three brands i.e. at least one is different from the expected value.
The expected frequency = [tex]f_e[/tex]
The observed frequency = [tex]f_o[/tex]
[tex]f_e[/tex] [tex]f_o[/tex] [tex](f_o- f_e)^2[/tex] [tex]\dfrac{(f_o - f_e)^2}{f_e}[/tex]
37 30 49.00 1.633
21 30 81.00 2.700
32 30 4.00 0.133
[tex]X^2 = \sum\dfrac{(f_o-f_e)^2}{f_e} = 4.47[/tex]
Degree of freedom = [tex](n-1)[/tex]
= 3 -1
= 2
At ∝ = 0.05 and df = 2
The critical value [tex]X^2_{0.05, 2}= 5.99[/tex]
Decision rule:
Since the calculated chi-square is less than the critical value, we do not reject the null hypothesis.
Thus, the null is retained with a calculated chi-square value of 4.47 and a critical chi-square value of 5.99.
(05.08A)The figure below shows three quadrilaterals on a coordinate grid:
A coordinate plane is shown. Figure Q is a quadrilateral with sides measuring 5 and 2. Figure S is a quadrilateral with sides measuring 5 and 2. Figure W is a quadrilateral with sides measuring 10 and 4.
Which of the following statements is true about the three quadrilaterals?
Q and W are similar but not congruent.
W and S are similar and congruent.
W and Q are similar and congruent.
Q and S are similar but not congruent.
Answer:
Q and w are similar BUT NOT CONGRUENT
Step-by-step explanation:
I TOOK THE QUIZ lol
Answer:
a
Step-by-step explanation:
Choose all equations for which x=2 is a solution.
A:x+3=5
B:x+2=8
C:x+1=1
D:x-2=4
Ex-7=5-
Which math expression means "the difference of 40 and 12"?
Answer:C
Step-by-step explanation:This is because c has subtract sign and you are trying to find the difference and difference you need to subtract.And you need to find the difference of 40 and 12 so u write 40- 12 which is choice c.
Hope it helps and it does please give Brainliest .Thanks ;)
HELLPPP PLEASE WILL GIVE BRAINLIEST
Answer:
25
Step-by-step explanation:
90-65=25
A department store is having a clothing sale. If a $35.00 pair of pants has a discount tag of 20% off, what is the sale price?
Answer:
$28.00
Step-by-step explanation:
You start with 35.00.
Now 10% of this is 3.5.
Multiply by 2 because it's 20%.
You get 7, so 7 is 20% of 35.00.
35.00 minus 7 is 28.00.
The pair of pants will be 28.00 dollars!
will give brailest Solve the following equation to find the value of r?
r/8.5=16
Answer:
R=296
Step-by-step explanation:
Multiplication is the opposite of division so you want to multiply both your given numbers.
Hope this helped
hey lol help lol
There is a tree growing
outside the classroom window that is 6 feet tall. It casts a shadow that is 4 feet long. What is the length of a shadow cast at the
same time of day by a smaller plant that is 18 inches high?
Answer:
Just cut the tree down and stick it to the teachers.
Step-by-step explanation:
7 1/2 + X + 15? What is X?
Hw help ASAPPP
+10PTS
y= -1 pretty sure that is correct
your parent gave you a gift cart for your favorite coffee shop. the card was worth $50 when you got it . each day, buy a drink for $3 . which equation shows the value on the gift card over time ?
Answer:
x-3
Step-by-step explanation:
x representing the amount of money on the gift card
Step 3: Apply Quantitative Tools
Use computational and algebraic tools to quantify the total costs (gas, maintenance/repairs, purchase price) for each scenario over the three years.
Round your answers to the nearest dollar.
Scenario
Total Cost for Three Years
Keep the old car
$
Number
Buy the fuel-efficient used car
$
Number
Step 4: Make an Informed Decision
Based on the information presented what do think Manny should decide?
Option #1: Keep the old car
Option #2: Buy the fuel-efficient used car
Option #
Number
Answer: Total old car is $2955.89, new car $1080.94 *for 3yrs
Step-by-step explanation:
Old= [(100/19)($2.36)(52)+$770]*3 = $2955.89
New=[(100/34)($2.36)(52)+20(12)]*3= $1080.94
I keep the old car # 1
PLEASE ANSWER
At Shoe Carnival a pair of shoes costs $83.05. How much do the shoes
cost after a 15% discount? *
Answer:
$70.59
Step-by-step explanation:
15% of $83.05 = 12.4575$83.05 - $12.4575 = $70.59I hope this helps!
Factorise (3m -2n)^2 +5p(3m - 2n)
Answer: if you factor it you will get this-->(3m−2n)(3m−2n+5p)
Step-by-step explanation:
what assumption have you made in answering part b
You're assuming that this data set represents all of Mrs. Hassaan's pupils. Certain students could be missing from the histogram - for instance, there could be one or two students who missed the test, but for certain reasons will be taking a make-up exam. Their grade would not be recording in this data set, but they still contribute to the class size, and so would be unaccounted for here.
Danny charges $45 for 5 hours of swimming lessons, Martin charges $24 for 2 hours of swimming lessons.
Who offers a better deal?
(select) offers the better deal.
Answer:
Danny charges $45 for 5 hours of swimming lessons
Answer: Danny
Step-by-step explanation:
45/5=9 and 24/2=12 Danny charges 4.5 an hour and Martin charges 6 an hour so Danny is better.
Please help meh please
Step-by-step explanation:
Movie pricing per person is $7.75
hockey pricing per person is $7.90
The Movie pricing is less per person because 7.90<7.75
I hope it answers
Answer:
movies
Step-by-step explanation:
im adding a picture of the explination because i worked it out
y = -3x + 3
-3x - y = -6
Answer:
let it be equation 1 and 2
Step-by-step explanation:
-3x -(-3x+3) =-6
-3x +3x -3= -6
0x = -3
x = 0
y = -3(0) +3
y = 3
A patient needs a total dose of 50 grams of albumin. The pharmacy has 50 m
bottles of 25% Albumin in stock. How many bottles should the pharmacy
technician prepare to provide the required dose?
Answer : The number of bottles should the pharmacy technician prepare to provide the required dose are 4 bottles.
Step-by-step explanation :
As we are given that a patient needs a total dose of 50 grams of albumin and the pharmacy has 50 mL bottles of 25% Albumin in stock.
Now we have to determine the number of bottles should the pharmacy technician prepare to provide the required dose.
As,
The pharmacy has stock albumin = [tex]50mL\times \frac{25}{100}[/tex]
The pharmacy has stock albumin = 12.5 mL
So,
Number of bottles should the pharmacy technician prepare to provide the required dose = [tex]\frac{50}{12.5}[/tex]
Number of bottles should the pharmacy technician prepare to provide the required dose = 4
Therefore, the number of bottles should the pharmacy technician prepare to provide the required dose are 4 bottles.
Help please .
Solve for variable
its just a riddle tho i need it for math plz answer the riddle ill give brainliest
Answer:
Area Rugs
Step-by-step explanation:
find the angle with straight line y is equals to root 3 x minus 4 makes angle with y axis
Answer: Therefore the angle made by the line with y-axis is 30 degrees.
Step-by-step explanation:
''.''
Determine the slope and the Y-intercept of each linear equation. y = 6x
Answer:
Slope = 6
Y intercept = 0
Step-by-step explanation:
Given equation is: y = 6x
Equating it with y = mx + b
We find:
Slope m = 6
Y intercept b = 0
Consider the following problem: There are 722 identical plastic chips numbered 1 through 722 in a box. What is the probability of reaching into the box and randomly drawing the chip numbered 552
Answer:
Probability of reaching Chip number 552 = 1 / 722
Step-by-step explanation:
Given:
Total number of chips = 722
Chip number selected = 552
Computation:
Probability of reaching Chip number 552 = Number of chip selected / Total number of chips
Probability of reaching Chip number 552 = 1 / 722
Simplify the following expression and explain your answer. 3x-y+2y+4xy
show your work plss
Answer:
Step-by-step explanation:
Here you go mate
PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction
Step 1
3x-y+2y+4xy equation/Question
step 2
3x-y+2y+4xy simplify by removing brackets and combining terms
(4xy)+(3x)+(-y+2y)
4xy+3x+y
answer
4xy+3x+y
Answer:
(2x+2y)(2y)+3x-y
Step-by-step explanation:
. . 3x-y+2y+4xy
3x+y+4xy
x²+2xy+y²-x²+2xy-y²+3x-y
(x+y)²-(x²-2xy+y²)+3x-y
(x+y)²-(x-y)²+3x-y
=(x+y+x+y)(x+y-x+y)+3x-y
(2x+2y)(2y)+3x-y
(f-g)(x) =
x2 + x-4
x²+x+4
x2-x+6
x2 + x + 6
Answer:
(f – g)(x) =
x2 + x – 4
Step-by-step explanation:
The answer is A on edge, hope this helps!
Identify the constant of Proportionality Write an equation to relate weight, w, to the price, p.
Answer:
m = .45
p = .45w
______
.45 = 9/20
Explanation:
m is the rate of change equal to the price over the weight or p/w.
Because this relationship is proportional, each weight divided by its corresponding price must equal the same fraction because it is constant.
We can prove this by dividing each price by its weight to find this proportion.
1.35/3 = 2.7/6 = 27/60 = 9/20 = 0.45
1.71/3.8 = 171/380 = 9/20 = 0.45
2.34/5.2 = 234/520 = 117/260 = 9/20 = 0.45.
Since equal the same value, this means that 9/20 or .45 is our proportion.
in terms of p = mw
p/w = 9/20.
p = mw → p/w = m → m = p/w = .45 .
Thus, p = .45w,
so m = .45.
Which means that for every .45 or 9/20 w or weight, there is a price of $1.
Use the zero product property to find the solutions to the equation x2 + x – 30 = 12.
x = –7 or x = 6
x = –7 or x = –6
x = –6 or x = 7
x = 6 or x = 7
Answer:
answer is in the img below
Step-by-step explanation:
brainliest plzzz
Answer:
A) x= -7 or x = 6
Step-by-step explanation:
e2021
Simplify your answer
Answer:
11t-8
Step-by-step explanation:
19t-9+(-8t)+1
19t-9-8t+1
11t-8
Is (9w x 0) -12 and 9w -12 equivalent
Answer:
no its not
Step-by-step explanation:
You would have to multiply 9w times -12 and 0 times -12 which does not equal the equation