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
quester [9]
2 years ago
9

A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 21 subjects were assigned randomly to

the treatment group and received the new experimental drug. Based on these data, the computed two-sample t statistic is:
Mathematics
1 answer:
ANTONII [103]2 years ago
4 0

Answer:

I think the complete question should be:

A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 21 subjects were assigned randomly to the treatment group and received the new experimental drug. The other 23 subjects were assigned to the control group and received a standard well known treatment. After a suitable period of time, the reduction in blood pressure for each subject was recorded.

Treatment group n = 21, x1 mean = 23.48, sd = 8.01

Control group n = 23, x2 = 18.52, sd = 7.15

Based on these data, the computed two-sample t statistic is:

Step-by-step explanation:

Since the variances to be calculated from the sd are unequal we use this formula:

t statistics = (x1 - x2) / [(sd1²/n1) + (sd2²/n2) where n1 = 21, x1 mean = 23.48, sd1 = 8.01, n2 = 23, x2 = 18.52, sd2 = 7.15

Thus, we have

test statistic= (23.48-18.52) / [(8.01²/21) + (7.15²/23)]

Test statistics = 4.96 / (324.36/21)+(51.12/23)]

Test statistics = 4.96/ (15.45+2.43)

t statistic = 4.96 / 17.88

t statistics = 0.2774

I hope that helps, you can use this to solve for tours if the values are not the same

You might be interested in
Johnathan plans on using 2" x 12" boards that cost $2.50 per foot. Assuming he can purchase the exact amount he needs, how much
Kitty [74]

Answer:

$35

Step-by-step explanation:

7 0
3 years ago
Can someone help me with question 8??? I know how to solve it but I’m just making sure my math is right before I write it down
Nostrana [21]
Ion sorry I don’t know I’m tryna ask a question
7 0
2 years ago
Read 2 more answers
CAN SOMEONE HELP ME WITH THIS PLEASE AND THANK YOU.
svp [43]

Answer:

13/20

Step-by-step explanation:

To add fractions without the common denominator, you have to make them equal so

1/4 x 5 = 5/20

2/5 x 4 = 8/20

5/20 + 8/20 = 13/20

3 0
2 years ago
Read 2 more answers
What is the third quartile, Q3, of the following distribution?
GREYUIT [131]

Answer:

The third quartile is:

Q_3=29

Step-by-step explanation:

First organize the data from lowest to highest

4, 5, 10, 12, 14, 16, 18, 20, 21, 21, 22, 22, 24, 26, 29, 29, 33, 34, 43, 44

Notice that we have a quantity of n = 20 data

Use the following formula to calculate the third quartile Q_3

For a set of n data organized in the form:

x_1, x_2, x_3, ..., x_n

The third quartile is  Q_3:

Q_3=x_{\frac{3}{4}(n+1)}

With n=20

Q_3=x_{\frac{3}{4}(20+1)}

Q_3=x_{15.75}

The third quartile is between x_{15}=29 and x_{16}=29

Then

Q_3 =x_{15} + 0.75*(x_{16}- x_{15})

Q_3 =29 + 0.75*(29- 29)\\\\Q_3 =29

5 0
3 years ago
Read 2 more answers
Guysss i need helppppp.... please answer all of them and if u dont know please dont answer
lukranit [14]

Answer:

This says middle school.. What grade are you in? I am in 8th grade and do not know any of that...

I have never seen work near that.........

8 0
2 years ago
Read 2 more answers
Other questions:
  • Can somebody help asap
    8·1 answer
  • What is expanded form?
    12·1 answer
  • suppose the population of a certian city is 3784 thousand it is expected to decrease to 3001 thousand in 50 years find the perce
    7·1 answer
  • Felicia brought three bottles of apple juice and needs to split it between evenly into two cups. What fraction of a bottle will
    11·2 answers
  • What two integers does \sqrt21 fall between?
    6·1 answer
  • A mapping diagram showing a relation, using arrows, between input and output for the following ordered pairs: (negative 3, negat
    13·2 answers
  • Find the slope of the line that passes through the pair of points. (5.3, –2.5), (7.3, –12.5)
    11·1 answer
  • Mrs.tokalaka uses 9/10 of a can of coffe beans,each week.how many cans of beans does she use in 6 weeks? write your answer two d
    11·1 answer
  • Let X and Y be independent positive random variables. Let Z = X/Y.In what follows, all occurrences of x, y, z are assumed to be
    14·1 answer
  • Will give brailiest pls answer fast and hurry it's times not that hard too just look at the picture. hurry>
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!