A survey of 835 adults revealed that 74% of them said they get between 6-7 hours of sleep each night on average. In a study ofsleeping habits, researchers want to determine if less than 75% of adults get between 6-7 hours of sleep each night on average.Use a significance level of a = 0.06.a.) State the null and alternative hypothesis using correct symbolic form.Ho:H,:b.) Is this a left-tailed, right-tailed, or two-tailed hypothesis test?O left-tailedO right-tailedO two-tailed

Given claim: Less than 75% of adults get between 6-7 hours of sleep each night on average. a) Null…

Answered: A survey of 835 adults revealed that…

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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1 According to a Pew Research poll conducted in March 2022 involving n=556 parents, 133 said thattheir child spent too much time on social media. Test the claim that the percentage of U.S. parents whowould answer “too much time” is 24%, using a 0.01 significance level. (Hint: This is a two-tailed test).a. Null and alternative hypothesis (give both in symbolic form and sentence form):b. Test statistic and p-value (show the calculation or show what you entered into the calculator(screenshots are ok here)):c. Technical conclusion, circle one: reject the null hypothesis or fail to reject the null hypothesis Why did you choose to reject or fail to reject the null hypothesis?d. Nontechnical conclusion addressing the original claim:
Suppose a consumer group suspects that the proportion of households that have threeor more cell phones is 39%. A cell phone company has reason to believe that the proportion isnot 39%. Before they start a big advertising campaign, they conduct a hypothesis test. Theirmarketing people survey 186 households with the result that 93 of the households have three ormore cell phones. Conduct a hypothesis test to test the cell phone company’s belief at the 5%significance level. show all steps
Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected. Friday the 6th: 9 6 10 10 3 5 Friday the 13th: 14 13 13 9 5 12 What are the hypotheses for this test? Let μd be the ▼ mean of the differences difference between the means in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data. H0: μd ▼ less than< less than or equals≤ equals= greater than or equals≥ greater than> not equals≠ 0 H1: μd ▼ greater than> equals= not equals≠ greater than or equals≥ less than< less than or equals≤ 0 Find the value…
A study was conduced to investigate whether the mean number of snack bars sold at two airport convenience stores,C and D, were different. For ten randomly selected days, the number of snack bars sold at each store was recorded, and the sample mean number of snack bars for each store was calculated. A two-sample t-test for a difference in means will be conducted. Have all the conditions for inference been met? A.) Yes, all conditions have been met B.) No, the data were not collected using a random method C.) No, the sample sizs are greatr than 10 percent of the population D.) No, the sample sizes are not large enough to assume normality of the sampling distrbution E.) No, the distribution of the population is known to be skewed
Dr. Moo conducted a research project in which she compared the impact of two types of therapy (pizza therapy and chocolate therapy) and gender on college students’ happiness. How many null hypotheses did she have, and how would you write them?
Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected. Friday the 6th: Friday the 13th: 9. 7 11 11 4 5 0 13 13 13 10 6 12 What are the hypotheses for this test? Let Ha be the in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data. Ho: Hd H1: Hd Find the value of the test statistic. t = (Round to three decimal places as needed.) Identify the critical value(s). Select the correct choice below and fill the answer box within your choice. (Round to three decimal places as needed.) O A. The critical values are t= ± O B. The critical value is t = State the result of the test. Choose the correct…
In an experiment, students were given words to memorize, then were randomly assigned to either take a 90 minute nap or take a caffeine pill. A couple hours later, they were tested on their recall ability. We wish to test to see if the sample provides evidence that there is a difference in mean number of words people can recall depending on whether they take a nap or have some caffeine. a). What are the null and alternative hypotheses for this test?b). If the results of the test comparing sleep and caffeine for memory are statistically significant, what does that mean in terms of sleep, caffeine, and memory?c). If the results are not statistically significant, what does that mean in terms of sleep, caffeine, and memory?
2
Suppose that in a random selection of 100colored candies, 25%of them are blue. The candy company claims that the percentage of blue candies is equal to 28%. Use a 0.05 significance level to test that claim. a) Identify the null and alt hypothesis for this test. b) Identify the test statistic c) Identify the p-value d) Identify the conclusion
Of the 400 students chosen randomly to investigate the internet usage habits of students in a school, 0.62 stated that they follow the newspapers on the internet. Accordingly, test the claim that students who follow the newspapers on the internet are more than 60% at a 1% meaning level.
#1
2. A study performed in 2010 found that 4% of people with asthma have aspirin sensitivity. A hospital suspects that the percentage may actually be higher and tests a random sample of 310 asthma patients in controlled conditions. The hospital found that 20 out of the 310 asthma patients they tested had aspirin sensitivity. At the 0.05 significance level, test the claim that more than 4% of all asthma patients have aspirin sensitivity. a. State the i. Claim in words ii. Express the claim mathematically iii. What is the Null Hypothesis iv. What is the Alternative Hypothesis b. Which test procedure is appropriate to perform the required hypothesis test? c) Compute the value of the test statistic. d) What is the P-Value. Please round your P -value to three decimal places. P-Value = e) Should you reject the null hypotheses or not? f) What is your conclusion about the hypothesis test?

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