Read the following scenarios. For each scenario you need to decide which of the following four methods is appropriate.
A. One sample t test
B. Paired samples t test
C. Independent samples t test
D. One-way analysis of variance (ANOVA)
1. A shareholders' group suspects that the mean tenure of corporate chief executive officers (CEO) is significantly greater than the 5 years that CEO supporters claim. The group has hired a statistician who is using information on tenure of the last retired CEO in a sample of 30 corporations to test this claim.
2. All employees in a firm have recently received professional development training that is designed to improve their productivity. A manager wants to know whether or not the post-training productivity differs significantly across low-, medium-, and high-education employees.
3. A computer manufacturer has designed twenty-three prototype microcomputer central processing unit chips, and is using a sample of 506 computers (22 computers carrying each prototype) to evaluate whether the mean processing time differs significantly across the twenty-three prototypes.
4. In a blind taste experiment a group of potential customers were asked to rate the taste of two different coffee brands on a scale of 0 to 10. The experimenter wants to know whether or not on average the ratings differ for the brands.
5. A bank manager wants to know whether or not the average waiting time for bank customers is significantly different between two local branches of that bank.
6. A national auto dealers association claims that the mean price of a used car is $9,987. A used car dealership manager located in the City of Baltimore wants to test this claim using a sample of 45 cars currently parked at the dealership.
7. A computer manufacturer has discovered a method to improve performance of existing CPU chips by coating those chips with a fine layer of a special patented chemical. The manufacturer wants to test the effectiveness of this method in two groups of similar computers. The CPU chips in only one group have received a coating of the special chemical.
8. A computer manufacturer has discovered a method to improve performance of existing CPU chips by coating those chips with a fine layer of a special patented chemical. The manufacturer wants to test the effectiveness of this method in a sample of 54 computers by observing CPU performance before and after applying the coating.
9. A local landscaping business owner wants to test the hypothesis that the mean tree planting time differs significantly from 2 hours for her employees.
10. An educator wants to test the hypothesis that average SAT score in the population is the same in Belgium, Denmark, and Netherlands.
11. Using random state-level household samples, a social scientist wants to know whether or not the mean household size is the same across 50 states in the U.S.
12. It has been claimed that average nursing salaries in Milwaukee, Wisconsin are lower than those in Pittsburgh, Pennsylvania. A medical professional wants to test this claim using a sample of salaries from the two cities.
13. A student government representative at a mid-sized East Coast university wants to test the mean difference in GPA at the beginning and end of the freshman year using a sample of 89 undergraduate students.
14. All employees in a firm have recently received professional development training that is designed to improve their productivity. The training provider claims that such training increases employee productivity by 10%. A firm manager has obtained estimates of change in productivity for 32 employees who received the training, and wants to test the training provider's claim.

Help me please I need to find the equation

Dr Eberhardt has been conducting a study in which he wants to know how much glucose is generated by blue-green algae when they are placed under blue light for 4 hours. There are two methods that he can used to determine glucose levels and he needs to know which one is more accurate. In method 1, a hexokinase activity assay is used and the mean of 10 algal samples is 120 mmol, with a standard deviation of 4.8 In method 2, a glucose oxidase activity assay is used and the mean of the same 10 algal samples is 100 mmol, the standard deviation is 4.

Which method is more accurate?

a. both are equally accurate based on their coefficients of variation
b. method 2, because it has a smaller standard deviation
c. method 1, because although the standard deviation is greater so is the mean
d. you would need to know the range in order to see which is more accurate

2 divided by 3
In a fraction please

1. The Lincoln Middle School football team needs to raise at least $1,225 for new uniforms. They sell tickets for a school dance for $2 each, but they have to pay the DJ $500 students. Create an inequality that the football team can use to see how many tickets they must sell to reach their goal.

Find the mean, median, and mode of the following data:
(round to 1 decimal place as needed)
35, 17, 23, 28, 17, 27, 30, 17, 27, 18

A store sells juice in different sizes. Determine which size is the best buy and the unit price.

8 oz $2.40
24 oz $6.48
64 oz $14.08

​

someone help... please :/

What is 6 + 4(11 - 2) divided by 3^2
USE PENDAS
and show step by step of how you got to your answer
Will give BRAINLEST though only if the work you showed is correct AND the answer.

Solve 4x – 2(x + 1) = 3x + 10
Ox= -12
Ox=12
Ox= -8
Ox=8
HELP ASAP

The product of two positive consecutive integers is 462. Find the integers.

can somebody pleaase answer for me

How many 20p coins would you need to make £10?

Solve for x. 3 (2x + 7) = 15 (x - 4)

please help im hungry but I cant eat until I finish this
Isabella has $15.57 to buy strawberries at the store. Each pint of strawberries costs $2.35. How many full pints of strawberries can Isabella buy?

Last year, Lucy opened an investment account with $8800. At the end of the year, the amount in the account had Increased by 28.5% How much is this increase in dollars?

A bag contains 10 red marbles, 15 yellow marbles, 5 green marbles, and 20 blue marbles. Five marbles are drawn from the bag.

What is the approximate probability that exactly two of the five are blue?

1%
4%
36%
40%

Raquel kicks a football. The height in feet can
be modeled by the equation
h(x) = -16x2 + 64x.
How long in seconds before the ball reaches
its maximum height? Show work.
What is the maximum height of the ball? Show work.

answer fast please

12w=-8(-4w=10) please help

Please answer these four questions pleaseeeee

According to the Centers for Disease Control and Prevention (February 18, 2016), 1 in 3 American adults don’t get enough sleep. A researcher wants to determine if Americans are sleeping less than the recommended 7 hours of sleep on weekdays. He takes a random sample of 150 Americans and computes the average sleep time of 6.7 hours on weekdays. Assume that the population is normally distributed with a known standard deviation of 2.1 hours. Test the researcher’s claim at α = 0.01
a. Select the relevant null and the alternative hypotheses.
A. H0: μ = 7; HA: μ ≠ 7
B. H0: μ ≤ 7; HA: μ ≥ 7
C. H0: μ ≥ 7; HA: μ < 7
b. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)
Test statistic = ?
c. Find the p-value
A. p-value < 0.01
B. 0.01 ≤ p-value < 0.025
C. 0.025 ≤ p-value < 0.05
D. 0.05 ≤ p-value < 0.10
E. p-value ≥ 0.10
d. What is the conclusion at α = 0.01?
A. Reject H0 since the p-value is greater than α.
B. Reject H0 since the p-value is smaller than α.
C. Do not reject H0 since the p-value is greater than α.
D. Do not reject H0 since the p-value is smaller than α.
e. Make an inference.
A. There is insufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.
B. There is sufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.

Evaluate 4xy+7y-9x+21-3x^2 when x=2 and y=-1 pour answer​

Please help me?
8 + 12 ÷ ( 4 - 2 )​

Julie Ann works on an assembly line building computers. She can assemble 8 units an hour. Write an expression for the number of units she can produce in h hours. Question 2 options: h ÷ 8 h - 8 8 + h 8h

Which of the following is an Equivalent Fraction to: 3/8

A bicycle is originally priced at $80. The store owner gives a discount and the bicycle is now priced at $60. What is the percent of discount for the cost of the bicycle?

A grain silo is shaped like a cylinder. The height of the silo is 60 feet tall, and the circumference of

the base is a 20 feet. Which measurement is closest to the volume of the silo in cubic feet?

F 3,769.9 ft?

G 75,398.2 ft3

H 226,194.7 ft

J 18,849.6 ft3

FIRST TO ANSWER GETS A FULL POINTS

PLEASE ANSWER AND GIVE A BRIEF (short) EXPLANATION

each triangle is equilateral. is the relationship between the perimeter and the side length of the equilateral triangles proportional? explain

how to break 2/5 in a fraction.

Write as an equation.
Your test score is 50 divided by the sum of 8 and 60.
O 50/x = 8 + 60
O 50 = 8/60
50x = 8 + 60
O X = 50/(8 +60)

Anyone please help me with last two I'll vote brainliest!! :))