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3 years ago

The two-way table below describes the attendance at a movie theater at various times of the day.

Mathematics

2 answers:

Novosadov [1.4K]3 years ago

7 0

Answer:

There is an association because the relative frequencies by column are different.

Step-by-step explanation:

For checking the association of a two-way table we have to calculate the relative frequency of the table. Here we see that there is an association between timing and day pf watching the movie. Also here relative frequencies of both columns are similar.

egoroff_w [7]3 years ago

5 0

Answer:

Step-by-step explanation:

The two variables are time and day. The columns are similar because the two middle times are the most popular and the two outside times have less people. This shows a relationship

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The sample consisted of 50 night students, with a sample mean GPA of 3.02 and a standard deviation of 0.08, and 25 day students,

bulgar [2K]

Answer: The test statistic is t= -0.90.

Step-by-step explanation:

Since we have given that

n₁ = 50

n₂ = 25

$\bar{x_1}=3.02\\\\\bar{x_2}=3.04\\\\\sigma_1=0.08\\\\\sigma_2=0.06$

So, s would be

$s=\sqrt{\dfrac{n_1\sigma_1^2+n_2\sigma_2^2}{n_1+n_2-2}}\\\\s=\sqrt{\dfrac{50\times 0.08^2+25\times 0.06^2}{50+25-2}}\\\\s=0.075$

So, the value of test statistic would be

$t=\dfrac{\bar{x_1}-\bar{x_2}}{s(\dfrac{1}{n_1}+\dfrac{1}{n_2})}\\t=\dfrac{3.02-3.04}{0.074(\dfrac{1}{50}+\dfrac{1}{25})}\\\\t=\dfrac{-0.04}{0.074(0.02+0.04)}\\\\t=\dfrac{-0.04}{0.044}\\\\t=-0.90$

Hence, the test statistic is t= -0.90.

7 0

3 years ago

What is the twentieth term of the arithmetic sequence described by the<br> equation an= 3n - 10?

sergij07 [2.7K]

Answer:

The twentieth term is 50.

Step-by-step explanation:

The equation that describes the arithmetic sequence describes it's "general term", which means that all the numbers in that sequence must follow that equation. For instance, if we want to find the first term of the sequence we must make a = 1 and we have:

a1 = 3*1 - 10

a1 = -7

Therefore to find the twentieth term we need to make n equal to 20. This is done below:

a20 = 3*20 - 10

a20 = 60 - 10

a20 = 50

The twentieth term is 50.

8 0

3 years ago

I need help on question 9.

KengaRu [80]

Answer: C) 40 degrees

Step-by-step explanation:

if the total angle is 70 degrees and part of it is 30 degrees

then the other part is x degrees

30 + x = 70

30 - 30 + x = 70 - 30

x= 40

Hope this helped!

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7 0

3 years ago

Read 2 more answers

Directions: Study the thermometers and answer these questions.

Soloha48 [4]

Answer:

1. F:32 C:0

2. F:212 C:100

3. F:70 C:30

4. F: 97 C: 36.5

Step-by-step explanation:

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2 years ago

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Help please! Lily records the change in her dogs weight over 4 weeks what is the dogs average weekly weight change

madreJ [45]

Answer:

mabe divided by 2

Step-by-step explanation:

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3 years ago