9. A random survey of 75 death row inmates revealed that the mean length of time on death row is 17.4years with a standard deviation of 6.3 years. If you were conducting a hypothesis test to determine if thepopulation mean time on death row could likely be 15 years, what would the null and alternativehypotheses be?a. Ho:b. Ha

Answered: 9. A random survey of 75 death row…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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2) A job placement director claims that the average starting salary for nurse is $26000. A sample of 18 nurses has a mean salary of $25620 and a standard deviation of $680. Is there enough evidence to reject the directors claim at a = 5% LOS?
When students use the bus from their dorms, they have an average commute time of 8.263 minutes with standard deviation 2.9321 minutes. Approximately 75.67% of students reported a commute time greater than how many minutes? Assume the distribution is approximately normal. Question 10 options: 1) 6.22 2) 2.28 3) 14.24 4) 10.3 5) We do not have enough information to calculate the value.
Read each situation and perform the appropriate test of hypothesis for the one sample mean z-test and t-test. 2. A manufacturer claims that their car batteries have a mean life expectancy of 6 years with a population standard deviation of 1.75 years. In order to test its own claim, a random sample of 35 batteries were tested and it was found out their mean life span is 5. 5 years. Is there evidence at the 0.01 level of significance that the batteries become exhausted in less than 6 years?
The (DOH) in Davao City wants to identify the average number of COVID patients admitted in a certain hospital in Region XI every year. They randomly select 41 hospitals from this region with an average number of 250 COVID patients and a standard deviation of 20. What is the value of the sample mean?* A. 20 B. 41 C. 250 D. 100
a. State the null and alternative hypothesis.
The composite ACT scores for Idaho students who took the test in 2019 have average 22.3 with the standard deviation 2.25 and approximately normal distributed. In a random sample of 49 students who took the exam in 2019, the average composite ACT score is 23.5 with standard deviation 1.06. (show your work) Which one is true? 3 and 2.25 are statistics, and 1.06 are parameters. 3 and 2.25 are parameters, and 1.06 are statistics. All numbers 22.3, 2.25 and 23.5, 1.06 are parameters. All numbers 22.3, 2.25 and 23.5, 1.06 are statistics. What is the probability that the score is 23 or more if we random select one student? Find the 85th percentile the composite ACT scores for Idaho students
According to a study, brain weights of men in country A are normally distributed with mean 1.49 kg and standard deviation 0.14 kg. Apply the empirical rule to complete each sentence. Complete parts (a) through (d). a. Complete the sentence "Approximately 68% of the men have brain weights between _____ kg and _____ kg." Approximately 68% of the men have brain weights between nothing kg and nothing kg.
Are Americans getting fatter? Researchers interested in this question take a random sample of 500 people and record an average weight of 190 pounds and a standard deviation of 25 pounds. Ten years ago, the mean weight was 185 pounds. What are the null and alternative hypotheses?
3. A sociologist will conduct a two-sample t-test for a difference in means to investigate whether there is a significant difference, on average, between the salaries of people with bachelor's degrees and people with master's degrees. From a random sample of 32 people with a bachelor’s degree, the average salary was $55,000 with standard deviation $3,500. From a random sample of 28 people with a master's degree, the average salary was $58,000 with a standard deviation of $4,000. With a null hypothesis of no difference in the means, which of the following is the test statistic for the appropriate test to investigate whether there is a difference in population means (master's degree minus bachelor's degree) ? (58,000–55,000) A 3,500 + 28 4,000 32 (58,000–55,000) B 4,0002 3,5002 28 32 (58,000–55,000) t = 3,5002 + 28 4,0002 32 (58,000–55,000) | 4,000+3,500 28+32 (58,000–55,000) t E | 4,0002 +3,5002 28+32
Ee 449.

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