Question

Asked Sep 30, 2019

An advertiser was about to launch an advertisement campaign for a new product. He conducted a random survey to find the preference for the new product among the respondents. Based on his previous experience, he found the standard deviation for the population as 4. Because the population mean was not known to him, he randomly selected 25 responses and found that the sample mean preference for the new product was 10. Which of the following parameters did he use to calculate a confidence interval at the 95% confidence level for this population mean?

z0.10 | z0.05 | z0.025 | z0.01 | z0.005 |
---|---|---|---|---|

1.282 | 1.645 | 1.960 | 2.326 | 2.576 |

Step 1

Given population standard deviation = 4

mean = 10

sample size n = 25

The 95 % confidence interval has 95% ...

Tagged in

Q: Example. both SAT and ACT scores' distributions are mound shaped Mean 1000, Std. Dev. of 200 Mean 21...

A: z-score:X follows a distribution that has mean µ and standard deviation σ. It is the number of stand...

Q: After conducting a literacy test on inmates, the evaluator realizes that the test was much more diff...

A: Given that after conduting a litrecy test on inmates, the evaluator realises that the test was much ...

Q: Suppose a company wants to determine the percentage of customers who shop online. How many customers...

A: Given dataError = 3% = 0.03Confidence level = 0.92

Q: Find the number of distinguishable arrangements of the word "EMPATHY".Your answer is :

A: Click to see the answer

Q: 4. Which of the following is the single best description of the role of the z-score in statistical m...

A: z-score:X follows a distribution that has mean µ and standard deviation σ. It is the number of stand...

Q: I am having trouble finding the median. Would you be able to simplify it for me?

A: Note:Hey there! Thank you for posting the question. As you have not given any particular dataset, we...

Q: Question Help Is a measure of 25 inches "far away" from a mean of 19 inches? As someone with knowl...

A: It is given that the mean is 19 inches and standard deviation is 2 inches.a.z-score:X follows a dist...

Q: What's the Z score and how is it calculated?

A: We know z-score is used in many fields. But we should know what is the meaning of z-score and how to...

Q: The heights of seasonal pine saplings are normally distributed with a population standard deviation ...

A: The error bound is obtained below: