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Dovator [93]
3 years ago
14

A statistics teacher taught a large introductory statistics class, with 500 students having enrolled over many years. The mean s

core over all those students on the first midterm was ????=78 with standard deviation ????=10 . One year, the teacher taught a much smaller class of only 25 students. The teacher wanted to know if teaching a smaller class was more effective and students performed better. We can consider the small class as an SRS of the students who took the large class over the years. The average midterm score was x¯=83 . The hypothesis should be:
Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer:

Step-by-step explanation:

Given that a statistics teacher taught a large introductory statistics class, with 500 students having enrolled over many years.

Mean = 78 and std dev =10

Next time, sample size n was reduced to 25

For smaller sample size the mean was found to be = 83

The teacher wanted to know if teaching a smaller class was more effective and students performed better

ie comparison of two means of two samples should be done with different sample sizes but same teacher.

Hence hypothesis should be:

H_0: \bar x =\bar y\\H_a : \bar x

where x denotes the I sample and Y the second with 25 students.

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LiRa [457]

Answer:

approx. 3 hours

Step-by-step explanation:

14 newspapers in 20 minutes means he can deliver 42 newspapers an hour.

60/42 = 1.4285 newspapers per minute

131 x 1.4285 = 187.1335 minutes = 3.1188 hours

7 0
2 years ago
93000000 in standard form
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2 years ago
Solving two-step equations:
aleksklad [387]

Answer:

Mia scored 6 baskets Last Saturday.

Step-by-step explanation:

Let:

Mia made score of baskets on Last Saturday = x

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Total score of baskets = 24

We need to find How many baskets did Mia score last Saturday?

We can write:

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24=x+3x

Solving this equation we can find value of x:

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4 0
2 years ago
Can someone explain this? and what are the answers- :'_
Sunny_sXe [5.5K]

Answer:

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Step-by-step explanation:

Use inverese operations to isolate variables ex. x+4=2

x times 2 = 6                                                            -4

/2                                                                               x=-2

x=3                                                                        

                                                                               

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3 years ago
Which explanation describes the function relationship between n and f(n)?
Cloud [144]
(2) answer that explanation
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2 years ago
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