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The average height of females in a population of a certain college has been 162 centimeters...
Historically, the average height of females in the freshman class of a certain college has been...
Historically, the average height of females in the freshman class of a certain college has been 162.5 centimeters. Is there reason to believe that there has been a change in the average height if a random sample of 50 females in the present freshman class has an average height of 165.2 centimeters, with a standard deviation of 6.9 centimeters? Assume the level of significance equals 0.05 and that height is normally distributed. What is/are the critical value(s) for this hypothesis...
Please write the full derivation of the answers. Thank you! Q3) 2 points The average height...
Please write the full
derivation of the answers. Thank you!
Q3) 2 points The average height of females in the freshman class of a certain college has historically been 162.5 centimeters with a standard deviation of 6.9 centimeters. Is there reason to believe that there has been a change in the average height if a random sample of 50 females in the present freshman class has an average height of 165.2 centimeters? Use a P-value in your conclusion. Assume the...
The average American gets a haircut every 36 days. Is the average larger for college students?...
The average American gets a haircut every 36 days. Is the average larger for college students? The data below shows the results of a survey of 12 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 39, 32, 33, 38, 33, 38, 37, 31, 42, 47, 42, 45 Copy to clipboard What can be concluded at the = 0.10 level of significance? For this study, we should use Select an...
In the past the average age of employees of a large corporation has been 40 years....
In the past the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of 25 employees was selected. The average age in the sample was 42.5 years with a sample standard deviation of 5 years. Using a significance level of α = .01, do the sample data provide support...
Test the claim that the population of sophomore college students has a mean grade point average...
Test the claim that the population of sophomore college students has a mean grade point average greater than 2.25. Sample statistics include n = 51, xbar = 2.39, and s = 0.9. Use a significance level of significance= 0.05. Question 1: The test statistic is: Question2: The P-Value is between : ____< P-value < _____ Got t statistic is 1.1108 which is correct but am having trouble finding answer to second question. Please explain how to find it as well...
The average American gets a haircut every 43 days. Is the average larger for college students?...
The average American gets a haircut every 43 days. Is the average larger for college students? The data below shows the results of a survey of 12 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 45, 53, 39, 46, 37, 47, 43, 40, 35, 53, 39, 55 What can be concluded at the the α = 0.10 level of significance level of significance? A) For this study, we should...
Follow the procedure for Testing a hypothesis: A county is interested in finding the proportion of...
Follow the procedure for Testing a hypothesis: A county is interested in finding the proportion of the population that Hs been vaccinated for the flu this season. A Simple random sample of 680 residents is taken and it is found that 357 have been vaccinated. Claim: Over 50% of the population has been vaccinated for the blue with a level of significance or 0.01. Step 2: Determine Ho and Ha. Express Ho and Ha both verbally and symbolically. The symbolic representation includes the parameter that...
the average length of time for students to register for fall classes at a certain college has been 50 minutes
the average length of time for students to register for fall classes at a certain college has been 50 minutes. a new registration procedure using modern computing machine is being tried. if a random sample of 12 students had an average registration time of 42 minutes with a standard deviation of 11.90 minutes under the new system, test the hypothesis that the population mean is now less than 50 using:a. 0.05 level of significance and b. 0.01 level of significance.
In a survey of 180 females who recently completed high school, 75% were enrolled in college....
In a survey of 180 females who recently completed high school, 75% were enrolled in college. In a survey of 160 males who recently completed high school, 65% were enrolled in college. At a =0.06, can you reject the claim that there is no difference in the proportion of college enrollees between the two groups? Assume the random samples are independent. Complete parts (a) through (@). (a) Identify the claim and state Ho and Ha. The claim is "the proportion...
Assume the average gasoline price of one of the major oil companies has been $3.00 per...
Assume the average gasoline price of one of the major oil companies has been $3.00 per gallon for quite some time. Because of recent shortages in production of crude oil, it is believed that there has now been a significant INCREASE in the average price. In order to test this belief, we randomly selected a sample of 36 of the company's gas stations and determined that the average price for the stations in the sample was $3.06. Assume that the...
Please write the full
derivation of the answers. Thank you!
Q3) 2 points The average height of females in the freshman class of a certain college has historically been 162.5 centimeters with a standard deviation of 6.9 centimeters. Is there reason to believe that there has been a change in the average height if a random sample of 50 females in the present freshman class has an average height of 165.2 centimeters? Use a P-value in your conclusion. Assume the...
In a survey of 180 females who recently completed high school, 75% were enrolled in college. In a survey of 160 males who recently completed high school, 65% were enrolled in college. At a =0.06, can you reject the claim that there is no difference in the proportion of college enrollees between the two groups? Assume the random samples are independent. Complete parts (a) through (@). (a) Identify the claim and state Ho and Ha. The claim is "the proportion...
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