Question

Asked Dec 8, 2019

4 views

Step 1

From the given information, the claim of the problem is the return rate is less than 20%.

**Null hypothesis:**

* *

*H*_{0}: *p**=0.2*.

That is, there is no significance evidence that the return rate is less than 20%.

**Alternative hypothesis:**

* *

*H*_{1}: *p**<*0.2.

That is, there is a significance evidence that the return rate is less than 20%.

The correct option is ** B. H_{0}: p=0.2 and H_{1}: p<0.2**.

From the given information, in a sample of 6993 respondents, 1308 of them are returned.

The sample size is, *n* =6993 and *x*=1308. The sample proportion is *p̂* =0.19(=1308/6993)

The test statistic is ** ̶ 2.08** and it is calculated below

Step 2

The *P*-value is **0.019** and it is calcula...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: Need answer to question 14.

A: 11)From the given information, sample of 400 undergraduates from the U.S and find that 302 receive f...

Q: Can you do Problem 2 questions (a) and (b)?

A: (a) The first quartile of the given funds is 513.201 and it is calculated by using the Excel functio...

Q: Use the normal distribution and the given sample results to complete the test of the given hypothese...

A: Given Data

Q: You wish to test the following claim (Ha) at a significance level of a = 0.02. H.:µ = 67.7 Ha:µ < 67...

A: Given:From the data, sample mean is = 62.2 and the Sample standard deviation is s = 6.6, and the sa...

Q: ANOVAs are to be used when the dependent variable is interval or ratio and the independent variable ...

A: The correct option is: (2) Categorical with more than two categories. ANOVA is a statistical model t...

Q: A randomized controlled trial is run to evaluate the effectiveness of a new drug for asthma in child...

A: The null and the alternative hypotheses used for testing the significant difference in the mean ages...

Q: Do the data for 300 exams suggest a significant deviation from what Professor X’s distribution has b...

A: The null and alternative hypotheses are stated below:

Q: probability of having all girls in a fmaily of 4

A: Assuming that probability of having a boy and girl are independent events with equal probability 0.5...

Q: From the given Joint probability table, answer the questions given below. Household Income ...

A: 1.The probability one of these household has an income below $25000 is,From the joint probability di...