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Pani-rosa [81]
3 years ago
14

The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks the mean age for online stu

dents is older than 26.6. She randomly surveys 56 online students and finds that the sample mean is 29.4 with a standard deviation of 2.1. Conduct a hypothesis test.
Mathematics
1 answer:
Vlad1618 [11]3 years ago
4 0

Answer:

hope this help good luck

Step-by-step explanation:

a. H0: μ = 26.6

b. Ha: μ > 26.6

c. Let x = the mean age for online students at De Anza College.

d. Student’s t-distribution

e. 9.98

f. p-value = 0.0000

g. Check student’s solution.

h. i. Alpha: 0.01        

ii. Decision: Reject the null hypothesis.        

iii. Reason for decision: The p-value is less than 0.01.        

iv. There is sufficient evidence to conclude that the mean age of online students at De Anza College is greater than 26.6 years.i. (28.8, 30.0)

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Marisol bought 2 7/8 pounds of bananas, a 3 1/2 pound bag of apples, and 2 bags of oranges that each weighed 2 3/4 pounds. How m
attashe74 [19]

Answer:

9 3/4

Step-by-step explanation:

Pounds of bananas=2 7/8

=23/8

Pounds of apple=3 1/2

=7/2

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11/4 each.

Total pounds of oranges=2(11/4)

=22/4

Total pounds of fruits Marisol bought from the market=pounds of bananas+pounds of apples+pounds of oranges

=28/8+7/2+22/8

Find the L.C.M and add them

The L.C.M=8

Total pounds of fruits =28+28+22/8

=78/8

=9 6/8

Equivalent to

9 3/4

3 0
3 years ago
What is a statement that is true for any number or variable?
Gnesinka [82]
They all have the common factor of 1

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I hope this helps!
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3 years ago
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Keith is racing his little sister Pattie and has given her a 15 foot head start. She runs 5ft/sec and he is chasing at 8ft/sec.
hodyreva [135]
Pattie runs at 5 ft/sec
She has got a head start of 15 feet.
So after 1 second, Pattie runs = (5+15) ft <span>                                                   
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After 2 second Pattie runs = (20+5)ft
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After 3 second Pattie runs = (25+5) ft
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After 4 seconds Pattie runs = (30+5) ft
                                             = 35 ft
After 5 seconds Pattie runs = (35+5) ft
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After 6 seconds Pattie runs  = (40+5) ft
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Now Keith runs at 8 ft/sec
After 1 second Keith runs = 8 ft
After 2 second Keith runs = (8+8) ft
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After 3 second Keith runs = (16+8) ft
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After 4 second Keith runs = (24+8) ft
                                          = 32 ft
After 5 second Keith runs = (32+8) ft
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After 6 second Keith runs = (40+8) ft
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So Pattie will stay ahead of Keith upto 4 seconds. In the 5th second Pattie and Keith will be level and in the 6th second Pattie will be overtaken by Keith.


8 0
3 years ago
I need this answer answered for me asap
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Answer: i think it's A or D

Step-by-step explanation:

7 0
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Help I don’t know what number.
elena-s [515]

Answer:

x<-4

Step-by-step explanation:

If the circle is hollow that means it is either < or >. Since the arrow is pointing to the left it is <.

5 0
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