10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p(1) versus H1: p(2) (Round to two decimal places as needed.) Use technology to find the 99% confidence interval. The lower bound is The upper bound is (Round to two decimal places as needed.) What is the correct conclusion?

MATLAB: An Introduction with Applications
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**Hypothesis Testing Problem**

11. In a survey, 31% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so he randomly selected 170 pet owners and discovered that 47 of them spoke to their pet on the telephone. Does the veterinarian have a right to be skeptical? Use the α = 0.1 level of significance.

**Standard Normal Distribution Tables:**
- [View standard normal distribution table (page 1)](link)
- [View standard normal distribution table (page 2)](link)

**Conditions to Validate:**

*Because* \( n p_0 (1 - p_0) = \underline{\hspace{2cm}} (1) \) *is at least* 10, *the sample size is* \( \underline{\hspace{1cm}} (2) \) *5% of the population size, and the sample* \( \underline{\hspace{1cm}} (3) \) *the requirements for testing the hypothesis* \( \underline{\hspace{1cm}} (4) \) *are satisfied.*
*Round to one decimal place as needed.*

**Hypotheses:**
- Null hypothesis (\( H_0 \)): \( \underline{\hspace{1cm}} (5) \) \( \underline{\hspace{1cm}} (6) \) \( \underline{\hspace{1cm}} \) *versus* 
- Alternative hypothesis (\( H_1 \)): \( \underline{\hspace{1cm}} (7) \) \( \underline{\hspace{1cm}} (8) \)
*Type integers or decimals. Do not round.*

**Test Statistic** (\( z_0 \)):
- \( z_0 = \underline{\hspace{2cm}} \) *(Round to two decimal places as needed.)*

**Critical Values:**
Select the correct choice below and fill in the answer box to complete your choice.
*(Round to two decimal places as needed.)*

- A. \( \pm z_{\alpha / 2} = \pm \underline{\hspace{1cm}} \)
- B. \( z_{\alpha} = \underline{\hspace{1cm}} \)

**Conclusion:**

Does the veterinarian have a right to be skeptical?

Choose one:
- A. The veterinarian
Transcribed Image Text:**Hypothesis Testing Problem** 11. In a survey, 31% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so he randomly selected 170 pet owners and discovered that 47 of them spoke to their pet on the telephone. Does the veterinarian have a right to be skeptical? Use the α = 0.1 level of significance. **Standard Normal Distribution Tables:** - [View standard normal distribution table (page 1)](link) - [View standard normal distribution table (page 2)](link) **Conditions to Validate:** *Because* \( n p_0 (1 - p_0) = \underline{\hspace{2cm}} (1) \) *is at least* 10, *the sample size is* \( \underline{\hspace{1cm}} (2) \) *5% of the population size, and the sample* \( \underline{\hspace{1cm}} (3) \) *the requirements for testing the hypothesis* \( \underline{\hspace{1cm}} (4) \) *are satisfied.* *Round to one decimal place as needed.* **Hypotheses:** - Null hypothesis (\( H_0 \)): \( \underline{\hspace{1cm}} (5) \) \( \underline{\hspace{1cm}} (6) \) \( \underline{\hspace{1cm}} \) *versus* - Alternative hypothesis (\( H_1 \)): \( \underline{\hspace{1cm}} (7) \) \( \underline{\hspace{1cm}} (8) \) *Type integers or decimals. Do not round.* **Test Statistic** (\( z_0 \)): - \( z_0 = \underline{\hspace{2cm}} \) *(Round to two decimal places as needed.)* **Critical Values:** Select the correct choice below and fill in the answer box to complete your choice. *(Round to two decimal places as needed.)* - A. \( \pm z_{\alpha / 2} = \pm \underline{\hspace{1cm}} \) - B. \( z_{\alpha} = \underline{\hspace{1cm}} \) **Conclusion:** Does the veterinarian have a right to be skeptical? Choose one: - A. The veterinarian
10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed.

What are the null and alternative hypotheses?

H₀: p (1) ____________ versus H₁: p (2) ____________

(Round to two decimal places as needed.)

Use technology to find the 99% confidence interval.

The lower bound is ____________.
The upper bound is ____________.

(Round to two decimal places as needed.)

What is the correct conclusion?

- A. Since the interval contains the proportion stated in the null hypothesis, there is insufficient evidence that parents' attitudes have changed.

- B. Since the interval contains the proportion stated in the null hypothesis, there is sufficient evidence that parents' attitudes have changed.

- C. Since the interval does not contain the proportion stated in the null hypothesis, there is sufficient evidence that parents' attitudes have changed.

- D. Since the interval does not contain the proportion stated in the null hypothesis, there is insufficient evidence that parents' attitudes have changed.

(1) ⃝ >   (2) ⃝ > 

(1) ⃝ <   (2) ⃝ = 

(1) ⃝ ≠   (2) ⃝ < 

(1) ⃝ =   (2) ⃝ ≠
Transcribed Image Text:10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? H₀: p (1) ____________ versus H₁: p (2) ____________ (Round to two decimal places as needed.) Use technology to find the 99% confidence interval. The lower bound is ____________. The upper bound is ____________. (Round to two decimal places as needed.) What is the correct conclusion? - A. Since the interval contains the proportion stated in the null hypothesis, there is insufficient evidence that parents' attitudes have changed. - B. Since the interval contains the proportion stated in the null hypothesis, there is sufficient evidence that parents' attitudes have changed. - C. Since the interval does not contain the proportion stated in the null hypothesis, there is sufficient evidence that parents' attitudes have changed. - D. Since the interval does not contain the proportion stated in the null hypothesis, there is insufficient evidence that parents' attitudes have changed. (1) ⃝ > (2) ⃝ > (1) ⃝ < (2) ⃝ = (1) ⃝ ≠ (2) ⃝ < (1) ⃝ = (2) ⃝ ≠
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