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natta225 [31]
3 years ago
6

A recent national survey found that high school students watched an average (mean) of 7.2 movies per month with a population sta

ndard deviation of 1.0. The distribution of number of movies watched per month follows the normal distribution. A random sample of 49 college students revealed that the mean number of movies watched last month was 6.5. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students?
1. State the null hypothesis and the alternate hypothesis. A. H0: μ ≥ 7.2; H1: μ < 7.2
B. H0: μ = 7.2; H1: μ ≠ 7.2
C. H0: μ > 7.2; H1: μ = 7.2
D. H0: μ ≤ 7.2; H1: μ > 7.2
2. State the decision rule.
A. Reject H1 if z < –1.645
B. Reject H0 if z > –1.645
C.Reject H1 if z > –1.645
D. Reject H0 if z < –1.645
3. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Value of the test statistic______________?
4. What is the p-value? (Round your answer to 4 decimal places.) ________________?
Mathematics
1 answer:
guajiro [1.7K]3 years ago
6 0

Answer:

Step-by-step explanation:

Download docx
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WHATS THE SLOPE <br> FAST CORRECT ANSWER = Thanks + Brainliest + 5 stars + 8 points
umka2103 [35]

Answer:

The slope of g(x) is: m=0

The slope of f(x) is: m-1

Step-by-step explanation:

For this exercise you need to know that:

1. By definition the slope of any horizontal line is zero (m=0)

2. The slope of a line can be calculated using the following formula:

m=\frac{y_2-y_1}{x_2-x_1}

In this case, you can observe in the graph of the function g(x) given in the exercise that it is an horizontal line.  Then, based on the explanation given before, you can conclude that its slope is:

m=0

To find the slope of the function f(x) shown in the table attached, you need to follow these steps:

- Choose two points  from the table:

(0,3) and (4,-1)

- You can say that:

y_2=-1\\y_1=3\\\\x_2=4\\x_1=0

- Substitute values into the formula m=\frac{y_2-y_1}{x_2-x_1}:

m=\frac{-1-3}{4-0}

- Finally, evaluating, you get:

m=\frac{-4}{4}\\\\m=-1

4 0
3 years ago
The largest living thing on earth is a California sequoia tree named the “General Sherman”. The diameter of the tree at the base
bearhunter [10]

Answer:

d

Step-by-step explanation:

d

8 0
3 years ago
Homework problem #7: 24567389+35432611=what there is soo much regrouping, could someone show me how to do it?
Natasha_Volkova [10]

Answer:

24567389+35432611 =60000000

Step-by-step explanation:

Given

24567389+35432611 =

Required

Solve

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

<em>The numbers in parentheses are carried from previous sum</em>

Start from the right

9 + 1 = 10 \to Write 0, carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

                         0

8 + 1 + (1) = 10 \to Write 0 carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

                       0 0

6 +3 + (1) = 10 \to Write 0 carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

                   0 0 0

7+2 + (1) = 10 \to Write 0 carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

                0 0 0 0

6 +3 + (1) = 10 \to Write 0 carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

             0  0 0 0 0

5 +4 + (1) = 10 \to Write 0 carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

         0  0  0 0 0 0

4 +5 + (1) = 10 \to Write 0 carry 1

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

      0  0  0  0 0 0 0

2 +3 + (1) = 6 \to Write 6

  2 4 5 6 7 3 8 9

+ 3 5 4 3 2 6 1 1

----------------------------

 6  0  0  0  0 0 0 0

Hence:

24567389+35432611 =6  0  0  0  0 0 0 0

8 0
3 years ago
( (−7.2) 2 − 6.4 ) × (1.8 + (−0.8))
Kipish [7]

Answer:

I dont know what you want me to do. But if you wanted it simpilfied its

−20.8.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
URGRENNTTT PLSS HELPP 50 POINTSS!!!!! Students were asked to simplify the expression cotangent theta plus tangent theta over cot
Naddika [18.5K]

The student that simplified the expression incorrectly is student 2

<h3>How to determine the incorrect result?</h3>

The steps are given as:

\frac{\cot(\theta) + \tan(\theta)}{\cot(\theta)}

Student 1:

  • Step 1: \frac{\cot(\theta)}{\cot(\theta)} + \frac{\tan(\theta)}{\cot(\theta)}
  • Step 2: 1 + \frac{\tan(\theta)}{\cot(\theta)}
  • Step 3: 1 + tan²(Ф)
  • Step 4: sec²(Ф)

Student 2:

  • Step 1: \frac{\cot(\theta)}{\cot(\theta)} + \frac{\tan(\theta)}{\cot(\theta)}
  • Step 2: \frac{1 +  \tan^2(\theta)}{\cot(\theta)/\tan(\theta)}
  • Step 3: sec²(Ф)/tan²(Ф)
  • Step 4: csc²(Ф)

As a general trigonometry rule;

\frac{\cot(\theta) + \tan(\theta)}{\cot(\theta)} = \sec^2(\theta)

This means that student 1 is correct, while student 2 is not

The first error in student 2's workings is in step 2, where we have:

\frac{\cot(\theta)}{\cot(\theta)} + \frac{\tan(\theta)}{\cot(\theta)} = \frac{1 +  \tan^2(\theta)}{\cot(\theta)/\tan(\theta)}

The above expression is not justified and cannot be proved by any trigonometry rule

Since the step 2 is incorrect, the other steps cannot be used.

Hence, the student that simplified the expression incorrectly is student 2

Read more about trigonometric expressions at:

brainly.com/question/8120556

#SPJ1

5 0
2 years ago
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