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
Sergeeva-Olga [200]
3 years ago
5

The manager of a mall conducted a survey among two groups (n1 = 100, n2 = 100) of visitors to the mall on different days. She fo

und that the first group spent an average of 60 minutes in the mall, while the second group spent an average of 90 minutes in the mall. If the manager wishes to see the difference in the average times spent by the two groups in the mall,
Which of the following could be the alternative hypothesis?

a. The difference in the average times spent by the two groups in the mall is 30 minutes.
b. There is at least some difference in the average times spent by the two groups in the mall.
c. There is a difference in the average times spent by the two groups in the mall, with a standard deviation of 30 minutes.
d. There is no difference in the average times spent by the two groups in the mall.
Mathematics
1 answer:
DedPeter [7]3 years ago
8 0

Answer:

Option B - There is at least some difference in the average times spent by the two groups in the mall.

Step-by-step explanation:

A null hypothesis is a hypothesis that states that there is no statistical significance between the two variables. Thus, It is usually the hypothesis that a researcher or experimenter will try to disprove or discredit. While an alternative hypothesis is one that states there is a statistically significant relationship between two variables.

Now, applying these definitions to the question, we can see that;

Null Hypothesis is;

H0; There is no difference in the average times spent by the two groups in the mall

While the alternative hypothesis is;

Ha; There is at least some difference in the average times spent by the two groups in the mall

Thus, correct answer is option B

You might be interested in
Someone again plz help my lil sister
NNADVOKAT [17]

Answer:

9 + 2j is the required algebraic equation.

3 0
2 years ago
I need help on this math problem.
olga nikolaevna [1]
(not sure if this is right but)
x (to the 2nd power) + y (to the 2nd power) = cos (90) (to the 2nd power)
5 0
2 years ago
Which of the data sets below has a range of 31?
mote1985 [20]
Not enough information given
6 0
3 years ago
Read 2 more answers
El que me resuelva esta tarea le doy corona .-.
shusha [124]

Answer:

Ok espera busco y t digo si?

3 0
2 years ago
Ken has $950 in a savings account at the beginning of the summer. He wants to have at least $600 in the account by the end of th
Neko [114]
Every week he withdraws $35 from the $950 in his savings, and he wants at least $600 by the end of the summer. So we could write:

\sf 950-35x\ge 600

Where 'x' is the number of weeks. Now let's solve it for 'x'.

Subtract 950 to both sides:

\sf -35x\ge -350

Divide -35 to both sides, don't forget to switch the sign when dividing/multiplying by a negative number:

\sf x\le 10

So he can only withdraw at money for at most 10 weeks if he wants at least $600 left in his account.
6 0
3 years ago
Other questions:
  • What is the LCM of 1/3 and 2/5
    10·1 answer
  • Plz help with my math!!!
    14·1 answer
  • Howmany days are their in a year
    14·2 answers
  • Please help me I don't know
    13·2 answers
  • How to solve 6^x-2=1/4
    12·1 answer
  • If 3x-8=-2 fins the value of x-6
    9·1 answer
  • Convert the following values into scientific notation. Which one has the negative exponent.
    15·1 answer
  • I need help ASAP. Will give Brainliest.
    7·2 answers
  • PLS HELP!!
    14·2 answers
  • 4 > p - 1
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!