Your medical research team is investigating the standard deviation of the cost of a 30-day supply of a certain heartmedication. A pharmaceutical company thinks that the standard deviation of the cost is less than $14. You want tosupport this claim. How would you write the null and alternative hypotheses?Ho: ▼H₂:Time Remaining: 01:19:04 Next

It is claimed by the pharmaceutical company that the standard deviation of cost of certain heart…

Answered: Your medical research team is…

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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Your medical research team is investigating the standard deviation of the cost of a 30-day supply of a certain heart medication. A pharmaceutical company thinks that the standard deviation of the cost is more than $18. You want to support this claim. How would you write the null and alternative hypotheses? H0: ▼ sigma less than 18σ<18 sigma less than or equals 18σ≤18 sigma greater than or equals 18σ≥18 sigma equals 18σ=18 sigma greater than 18σ>18 sigma not equals 18σ≠18 Ha: ▼ sigma less than or equals 18σ≤18 sigma greater than 18σ>18 sigma less than 18σ<18 sigma not equals 18σ≠18 sigma equals 18σ=18 sigma greater than or equals 18
answer 4
People spend an average of $11 on entertainment. You believe that for people who live in Arizona, this number is significantly lower. To test, you randomly sampled n=100 Arizona residents and asked them how much they spend on entertainment. The sample average of these respondents was $10.74 with a sample standard deviation of $1.2. If you want to test the null hypothesis that H0: u=11 vs Ha: u<11, what is the value of the test statistic?
A real estate agent claims that mean household incomes in Fairfax and Arlington are equal. Draw 32 residents randomly from Fairfax neighborhood we found the average income is $82,750 with population standard deviation $2900; while from 30 Arlington residents, the average income 81,200 with with population deviation $2225. f you don't trust its claim, what is the H 0, and what is the H a ? If you support its claim, what is the H 0, and what is the H a ?
answer 2
You are testing the claim that the mean GPA of night students is different than the mean GPA of day students. You sample 30 night students, and the sample mean GPA is 2.67 with a standard deviation of 0.97 You sample 45 day students, and the sample mean GPA is 2.86 with a standard deviation of 0.74 Calculate the test statistic, rounded to 2 decimal places
Now you know the range and interquartile range for the age variable...but you are concerned because both of these measures of variability are flawed (in fact, you can easily list the drawbacks of each measure because you have studied so well!). So, you realize it is also important to check out the standard deviation.You use SPSS and find that the standard deviation for the age variable is ________. Enter your answer rounded to two decimal places (i.e., 10.11, not 10, not 10.1, not 10.110).
Your medical research team is investigating the standard deviation of the cost of a 30-day supply of a certain heart medication. A pharmaceutical company thinks that the standard deviation of the cost is less than $17. You want to support this claim. How would you write the null and alternative hypotheses? H0: ▼ sigma not equals 17σ≠17 sigma equals 17σ=17 sigma less than or equals 17σ≤17 sigma less than 17σ<17 sigma greater than or equals 17σ≥17 sigma greater than 17σ>17 Ha: ▼ sigma less than or equals 17σ≤17 sigma not equals 17σ≠17 sigma greater than or equals 17σ≥17 sigma greater than 17σ>17 sigma equals 17σ=17 sigma less than 17
You are testing the claim that the mean GPA of night students is different than the mean GPA of day students.You sample 30 night students, and the sample mean GPA is 2.34 with a standard deviation of 0.6You sample 40 day students, and the sample mean GPA is 2.42 with a standard deviation of 0.67Calculate the test statistic, rounded to 2 decimal places
answer 1
Need help finding what t= to
A scientist has read that the mean birth weight, µ, of babies born at full term is 7.3 pounds. The scientist, believing that u is different from this value, plans to perform a statistical test. She selects a random sample of birth weights of babies born at full term and finds the mean of the sample to be 7.7 pounds and the standard deviation to be 1.5 pounds. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? Hu is ? H:u is ? In the context of this test, what is a Type I error? A Type I error is ? fact, u is A the hypothesis that u is when, in Suppose that the scientist decides to reject the null hypothesis. What sort of error might she be making?

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