1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Inessa05 [86]
2 years ago
14

A company is evaluating a new reading program that is supposed to improve test scores. The box plots show the results of reading

tests given before and after using the program. With this data, what is the most reasonable answer to the question: Does the program improve test scores 20 pts

Mathematics
1 answer:
Zepler [3.9K]2 years ago
8 0

Answer:

I would go with C.  

Step-by-step explanation:

Some of the students did better on the q1 and q3 area but overall the minimum and maxium are still the same amount so the effect didnt work.  The highest grade on the pretest was the same on the post test and likewise with the lowest score so the answer would be C

You might be interested in
An educator claims that the average salary of substitute teachers in school districts is less than $60 per day. A random sample
valentina_108 [34]

Answer:

t=\frac{58.875-60}{\frac{5.083}{\sqrt{8}}}=-0.626    

The degrees of freedom are given by:

df=n-1=8-1=7  

The p value would be given by:

p_v =P(t_{(7)}  

Since the p value is higher than 0.1 we have enough evidence to FAIl to reject the null hypothesis and we can't conclude that the true mean is less than 60

Step-by-step explanation:

Information given

60, 56, 60, 55, 70, 55, 60, and 55.

We can calculate the mean and deviation with these formulas:

\bar X= \frac{\sum_{i=1}^n X_i}{n}

s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

Replacing we got:

\bar X=58.875 represent the mean

s=5.083 represent the sample standard deviation for the sample  

n=8 sample size  

\mu_o =60 represent the value that we want to test

\alpha=0.1 represent the significance level

t would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the true mean is less than 60, the system of hypothesis would be:  

Null hypothesis:\mu \geq 60  

Alternative hypothesis:\mu < 60  

The statistic would be given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Replacing the info we got:

t=\frac{58.875-60}{\frac{5.083}{\sqrt{8}}}=-0.626    

The degrees of freedom are given by:

df=n-1=8-1=7  

The p value would be given by:

p_v =P(t_{(7)}  

Since the p value is higher than 0.1 we have enough evidence to FAIl to reject the null hypothesis and we can't conclude that the true mean is less than 60

3 0
3 years ago
HELP MEEEEEEEEEEEE<br><br><br> (please don't put a link or i don't know)
Leviafan [203]

Answer:

42 i think

Step-by-step explanation:

7 0
2 years ago
Show that there is no rational number whose square is 5<br><br>​
lozanna [386]

Answer:

Step-by-step explanation:

Take the square root of 5, which is 2.236, aka not a rational number. It doesn't come out to a whole number so therefore there is no rational solution

4 0
3 years ago
If a poll of 1,000 voters had been randomly sampled from 80% of the population, what is the chance it would have erroneously pre
Viktor [21]

Answer:

lost in the world ,the person alone ,wgo may god give the work of revenge the 10000000000000 vote

7 0
3 years ago
HELPPPPP I NEED THIS
Andru [333]

Answer:

D. 1.3

Step-by-step explanation:

5(1.3) = 6.5

Since the value of r is .2 less than b, b would be 1.5

2(1.5) = 3

6.5+3=9.5

3 0
3 years ago
Other questions:
  • True of false:There is always one solution of a system of linear equations.
    8·1 answer
  • Kathryn’s total assets are $57,219. Her total liabilities are $43,244. What is her net worth? A. $14,198 B. $1397 C. $13,975 D.
    6·1 answer
  • Help I’m so dumb ://
    8·1 answer
  • The ratio of white marbles to blue marbles and jays bag is 2 to 5 if there is there are more than 50 marbles in the bag what is
    5·1 answer
  • Find the slope and the y-intercept of the following: y = 3/4x-5
    9·2 answers
  • Plzzz help !!
    6·1 answer
  • What does anyone know what perimeter is and area to help for me friends
    10·1 answer
  • What did you do to the obtained GCF of the numerical coefficients and the
    15·1 answer
  • .
    10·1 answer
  • PLEASE HELP WILL GIVE YOU ALL MY POINTS In the picture, t || s, mz1 = 10x + 2, and mz2 = 12x - 22. Find the measure of angle 2.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!