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
irakobra [83]
3 years ago
12

Jan walks 3200 feet in 2 hours . How many feet does she walk per minute ?

Mathematics
1 answer:
Marizza181 [45]3 years ago
8 0

Answer:1600

Step-by-step explanation:I did 3200 divided by 2 and I got 1600

You might be interested in
$1950 plus 15% is what
Fudgin [204]
15% of 1950 = 1950 * 0.15 = 292.5
So, sum would be: 1950 + 292.5 = 2242.5

In short, Your Answer would be $2242.5

Hope this helps!
6 0
3 years ago
A medical researcher wondered if there is a significant difference between the mean birth weight of boy and girl babies. Random
Yuliya22 [10]

Answer:

b) independent samples t-test

t=\frac{(5.92 -5.74)-(0)}{\sqrt{\frac{1.88^2}{5}}+\frac{1.81^2}{5}}=0.154  

p_v =2*P(t_{8}>0.154) =0.881  

So with the p value obtained and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the mean of the group 1 (boys) is NOT significantly different than the mean for the group 2 (Girls).  

Step-by-step explanation:

The system of hypothesis on this case are:  

Null hypothesis: \mu_1 = \mu_2  

Alternative hypothesis: \mu_1 \neq \mu_2  

Or equivalently:  

Null hypothesis: \mu_1 - \mu_2 = 0  

Alternative hypothesis: \mu_1 -\mu_2\neq 0  

Our notation on this case :  

n_1 =5 represent the sample size for group 1  

n_2 =5 represent the sample size for group 2  

We can calculate the mean and deviation for eaach group with the following 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}}

\bar X_1 =5.92 represent the sample mean for the group 1  

\bar X_2 =5.74 represent the sample mean for the group 2  

s_1=1.88 represent the sample standard deviation for group 1  

s_2=1.81 represent the sample standard deviation for group 2  

If we see the alternative hypothesis we see that we are conducting a bilateral test and with independnet samples t test.

b) independent samples t-test

The statistic is given by this formula:  

t=\frac{(\bar X_1 -\bar X_2)-(\mu_{1}-\mu_2)}{\sqrt{\frac{s^2_1}{n_1}}+\frac{S^2_2}{n_2}}  

And now we can calculate the statistic:  

t=\frac{(5.92 -5.74)-(0)}{\sqrt{\frac{1.88^2}{5}}+\frac{1.81^2}{5}}=0.154  

The degrees of freedom are given by:  

df=5+5-2=8

And now we can calculate the p value using the altenative hypothesis:  

p_v =2*P(t_{8}>0.154) =0.881  

So with the p value obtained and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the mean of the group 1 (boys) is NOT significantly different than the mean for the group 2 (Girls).  

7 0
3 years ago
Https://allmylinks.com/zeoathiras<br><br> I’m bored. Owo
Savatey [412]

Answer:

Yeah same here

Step-by-step explanation:

8 0
2 years ago
Need help with question 2
Alex777 [14]
The answer is y= -x-1
8 0
3 years ago
Determine if the side lengths 6, 11, and 19 form a triangle. If it is a triangle, classify it by its sides.
Butoxors [25]
It is not triangle because the one side of triangle should be smaller than the other two sides
Let's check
6+11=17
17<19
Or
11+19=31
9<31
4 0
3 years ago
Other questions:
  • Chloe did some of her homework before dinner. She did 2/6 of her homework after dinner. She has 1/6 of her homework left. What f
    5·2 answers
  • Solve the system of equations.<br><br>x=y−9<br><br><br>8x−y=0<br><br><br>X=?<br><br>Y=?
    12·1 answer
  • Find the flux of the following vector fields across the given surface with the specified orientation. You may use either an expl
    10·1 answer
  • If the average grade of an English class rose from 70 to 85, what is the approximate percent increase?
    15·2 answers
  • What is 7 and 1/4% of 89.75?
    15·1 answer
  • Find fraction between 3/2 and 1/34
    11·1 answer
  • Point A(4,2) is translated according to the rule (x,y)-&gt; (x+1, y-5) and then reflected across the Y-axis.
    13·2 answers
  • If r = -\sqrt{2}, and a5 = \sqrt{2}, what is the first term of the sequence?
    10·1 answer
  • Solve for k.<br><br> 5 + 2k = 7
    11·2 answers
  • I NEED HELP can. someone help me please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!