B. Formulate the null hypothesis (Ho) andalternative hypothesis (H₁) for the following problemand identify if the hypothesis test is left-tailed, right-tailed, or non-directional.1. A doctor wants to know if the average recoverytime of a patient taking a particular medication is onemonth.2. A drug store wants to know if the average numberof sold paracetamol tables is more than 100 per day.

Hypothesis is an assumption that is being tested.

Answered: B. Formulate the null hypothesis (Ho)…

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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Identify the appropriate hypothesis test for each of the following research situations labeled (a) - (d). Make sure to label your responses clearly! A researcher conducts a study to determine whether there is a significant difference in life satisfaction between bisexual men and gay men. A researcher records the weekly alcohol consumption and the number of violent crimes committed by incarcerated adolescents. The researcher would like to determine whether there is a significant relationship between their teen’s alcohol A researcher would like to determine the effectiveness of her newly designed mnemonic training, a technique that is expected to improve memory. She selects a sample of n=30 participants, tests their memory skills then has them undergo the training for 4 hours. At the end of the training, participants’ memory skills are tested a second time. A researcher would like to determine whether gender (Male, Female) and sexual orientation (Gay, Bisexual, Heterosexual) affect…
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant.a. Increasing the alpha level from .01 to .05. b. Changing from a one-tailed test to a two-tailed test. c. Increasing effect size.
Many questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test. Suppose that 40% of all supermarkets in the US use recyclable plastic bags. We would like to assess if the proportion of supermarkets in Michigan that use recyclable plastic bags is more than the stated rate. For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________
A company has just developed a new antibiotic. 2 percent of children taking competing antibiotics experience a headache as a side effect. A researcher believes that the proportion of children taking the new antibiotic who experience a headache as a side effect is more than 0.02. We know that the null hypothesis is H0 : p = 0.02 and the alternative hypothesis is H1 : p > 0.02. Suppose that the sample evidence indicates thata. the null hypothesis is rejected. State the conclusion.b. the null hypothesis is not rejected. State the conclusion.
You are management for a chain of department stores. Your analytics team believes that the proportion of months with lost sales for one of your department stores is 25%. You believe it is higher than this, so you gather some data for the last 4 years. You find that for 48 months there were 17 months where there were lost sales. Do you have enough evidence to doubt your analytics team? a) What is the null hypothesis? b) What is the alternative hypothesis? c) What is the claimed population proportion? d) What is the sample proportion (called the test statistic) e) What is the std deviation f) What is the z-value of the test statistic? g) What is the p-value h) What is the conclusion in words
b. Identify the test statistic for this hypothesis test. c. Identify the P-value for this hypothesis test.
Which of the following is the correct way to report the results of a hypothesis test and a measure of effect size using a tstatistic? a. r2 = 0.42, t(19) = 2.30 , p < .05 b. t(19) = 2.30, p < .05, r2 = 0.42 c. t = 2.30, df = 19, p < .05, r2 = 0.42 d. t(19) = 2.30, r2 = 0.42, p < .05
Identify the type I error and the type II error that corresponds to the given hypothesis. The proportion of people who write with their left hand is equal to 0.23. Which of the following is a type I error? A. Reject the claim that the proportion of people who write with their left hand is 0.23 when the proportion is actually different from 0.23. B. Reject the claim that the proportion of people who write with their left hand is 0.23 when the proportion is actually 0.23. C. Fail to reject the claim that the proportion of people who write with their left hand is 0.23 when the proportion is actually different from 0.23. O D. Fail to reject the claim that the proportion of people who write with their left hand is 0.23 when the proportion is actually 0.23. Which of the following is a type Il error? O A. Reject the claim that the proportion of people who write with their left hand is 0.23 when the proportion is actually different from 0.23. B. Fail to reject the claim that the proportion of…
A random sample of n₁ = 16 communities in western Kansas gave the following rates of hay fever per 1000 population for people under 25 years of age. 121 115 124 99 134 121 110 116 113 96 116 116 135 96 96 116 A random sample of n₂ = 14 communities in western Kansas gave the following rates of hay fever per 1000 population for people over 50 years old. 113 86 106 102 113 94 94 108 103 99 78 105 88 100 Assume that the hay fever rate in each age group has an approximately normal distribution. Using the method outlined in Brase and Brase, do the data indicate that the age group over 50 has a lower rate of hay fever? Use a = 0,05. Do you reject or fail to reject the null hypothesis? Are the data statistically significant at the α = 0.05 level of significance?
1. What type of statistical analysis should you use to test this? A)Single sample z-test. B) Single sample t-test C) Independent samples t-test D) Independent samples t-test 2. Explain why 3. What is the dependent variable 4. What is the independent variable?
HR department wants to make sure that their hiring practices are independent of gender. In other words, they want to ensure that both men and women have an equal chance of being hired. The observed data related to this survey is summarized in the following table: Observed frequency Male Female Total Hired 45 35 Not Hired 32 28 Total Given Ho = “HR department hired male and female employees equally”, decide whether to reject or fail to reject the null hypothesis (α = 0.05).
Identify the type I error and the type II error that corresponds to the given hypothesis. The proportion of people who write with their left hand is equal to 0.31. Which of the following is a type I error? O A. Fail to reject the claim that the proportion of people who write with their left hand is 0.31 when the proportion is actually 0.31. B. Reject the claim that the proportion of people who write with their left hand is 0.31 when the proportion is actually 0.31. O C. Reject the claim that the proportion of people who write with their left hand is 0.31 when the proportion is actually different from 0.31. D. Fail to reject the claim that the proportion of people who write with their left hand is 0.31 when the proportion is actually different from 0.31.

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