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leonid [27]
3 years ago
15

A psychologist investigates the effect of instructions on the time required to solve a puzzle. 20 subjects are given the same pu

zzle and are randomly assigned to receive two different sets of instructions prior to the task. One group is told that the task is difficult and the other group is told that the task is easy. What test should be used to see if there are differences between the two groups with regards to the time it takes to solve the puzzle?
a. Z-Test
b. T-Test for One Sample
c. T-Test for Independent Samples
d. One Variable Chi Square
e. One-Way ANOVA
Mathematics
1 answer:
Lerok [7]3 years ago
8 0
B. t- test for one sample

hehehehehehhee
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The quotient of a number and 4 is at most 5
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If r = 8 units and h = 11 units, what is the volume of the cylinder shown above? Use 3.14 for . A. 2,210.56 cubic units B. 753.6
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If 6 people want to share a 30 pound bag of beans equally by weight how many pounds of beans should each person get? Between wha
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Answer:

The 6 people would each get 5lb. of beans. 5 lies between 4 and 6.

Step-by-step explanation:

To get the answer to this problem, all you have to do is divide the total pounds of beans by how many people there are. 30 ÷ 6= 5, so each person would get 5 pounds. Since 5 comes between 4 & 6, you can use that as your answer.

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The area of a rectangle is 70 m², and the length of the rectangle is 11 m less than three times the width. Find the dimensions o
11111nata11111 [884]

Step-by-step explanation:

the area of a rectangle is

length × width

in our case

length × width = 70 m²

length = 3×width - 11

we can use this second equation in the first and get

(3×width - 11) × width = 70

3×width² - 11×width - 70 = 0

the general solution to a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 3

b = -11

c = -70

x = (11 ± sqrt((-11)² - 4×3×-70))/(2×3) =

= (11 ± sqrt(121 + 840))/6 =

= (11 ± sqrt(961))/6

x1 = (11 + 31)/6 = 42/6 = 7

x2 = (11 - 31)/6 = -20/6 = -10/3

the negative solution is not applicable for a length in an object.

so, only x1 = 7 m is our solution.

the width of the rectangle is 7 m.

the length = 3×width - 11 = 3×7 - 11 = 21-11 = 10 m

7 0
2 years ago
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