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DedPeter [7]
2 years ago
6

Researchers randomly studied the relationship, if any, between male and female grade point averages in a population of seniors w

ho were not intending to go to college after high school. They wanted to construct a 95% confidence interval for this study on 50 men and 50 women. The mean average gpa for the men was 2.9 with a standard deviation of 0.5 and the mean average gpa for the women was 3.1 with a standard deviation of 0.4. Construct the confidence interval for the difference of two sample means.
Mathematics
1 answer:
prohojiy [21]2 years ago
4 0

Answer:

CHAPTER 1: INTRODUCTION

1.1 The Basics

Definition: statistics

Statistics is the science of collecting, organizing, interpreting, and learning from data.

COURSE GOAL:

Learn how to use statistical methods to translate data into knowledge so that we can investigate

questions in an objective manner. Here are some examples of questions we’ll have the tools to

answer before the end of the semester:

1. How can we estimate the percentage of American citizens who would vote for Hillary Clinton

if the presidential election were held today? How certain are we about our estimate?

2. What is the relationship between the amount of time spent studying and the score received

on an exam?

3. Is there an association between smoking and divorce? If so, does that mean smoking causes

divorce?

THREE ASPECTS OF STATISTICS

1. Design: Planning how to obtain data to answer the question of interest.

2. Description: Summarizing the data that are obtained.

3. Inference: Using sample data to learn about the population: make decisions and

predictions based on the data for answeri

Step-by-step explanation:

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suppose that the local sales tax rate is 6.25% and youpurchased a used carr for 16,800. what is the car's total cost
Gwar [14]

Total= Car Cost + (Car Cost * Tax %)


Total= $16,800 + ($16,800 * 6.25%)

convert % to decimal form; divide % by 100


Total= $16,800 + ($16,800 * 0.0625)

multiply inside parentheses


Total= $16,800 + $1,050


Total= $17,850



ANSWER: The total cost for the used car with tax is $17,850.


Hope this helps! :)


8 0
3 years ago
A woman bought 70 Cubes
KatRina [158]

Answer:

56 Sugar cubes

Step-by-step explanation:

75 x .25 = 18.75

75 - 18.75 = 56.25

Round down for the closest answer = 56

8 0
3 years ago
charlie charted the rainfall in abilene over a one year period. what is the difference between the median and the mode of the da
sveticcg [70]
3.14•8=B because it is the median
7 0
3 years ago
A plane flies over city A and reaches city B in 12 minutes, which is 120 miles away from it. Find the speed of the plane in mile
KonstantinChe [14]
The correct answer for the question that is being presented above is this one: "<span>C. 600 mi./hr. "</span>

Plane flies from City A to City B in 12 minutes. The distance is 120 miles.
12 minutes is just 0.2 of 60 minutes.
= 120 miles / 0.2 hour
= 600 miles / hour
4 0
3 years ago
Read 2 more answers
4(2x + 2) + 12 &gt; 100
Komok [63]

Answer:

x > 10

Step-by-step explanation:

4(2x + 2) + 12 > 100

4(2x + 2) > 100 -12

4(2x + 2) > 88

2x + 2 > 22

2x> 22-2

2x > 20

x > 10

3 0
3 years ago
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