I dont need explain, just result.

Question 2:

We wish to estimate the difference in the proportion of college students who use Instagram and the proportion of college graduates who use Instagram in a country with poor mobile internet. You sample 200 college students (cs), and find 35% use Instagram. You sample 120 college graduates (cg) and find 50% use Instagram. Find the 90% confidence interval. ____< Pcs-Pcg <____ Write a sentence to interpret your confidence interval in context______

Question 3:

Two schools conduct a survey of their students to see if they would be interested in having free tutoring available after school. We are interested in seeing if the first school population has a higher proportion interested in tutoring compared to the second school population. You wish to test the following claim (Ha) at a significance level of =0.02 Ho:p1=p2 Ha:p1>p2

You obtain 48% successes in a sample of size n1=415 from the first population. You obtain 41.5% successes in a sample of size n2=410 from the second population. How many students stated that they are interested in afterschool tutoring from School 1?_______ Round to the nearest whole number. How many students stated that they are interested in afterschool tutoring from School 2?_______ Round to the nearest whole number. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = _____ What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = _____ The p-value is...

• less than (or equal to)
• greater than

This test statistic leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• There is sufficient evidence to reject that the first school population has a higher proportion interested in tutoring compared to the second school population.
• There is not sufficient evidence reject that the first school population has a higher proportion interested in tutoring compared to the second school population.
• There is sufficient evidence to support that the first school population has a higher proportion interested in tutoring compared to the second school population.
• There is not sufficient sample evidence to support that the first school population has a higher proportion interested in tutoring compared to the second school population.

Question 4:

A researcher is investigating graduates of 2 colleges who participated in the colleges' physical therapy training programs. They take a random sample of students who graduated and gathered information on the following variables:

• College they attended (CSUF, UCLA)
• How long did it take to complete the program? (number of semesters)
• Did they find full time employment as a physical therapist (within 1 year of graduating)? (Yes, No)
• Did they work while attending program? (Full time, part time, no work)
• Monthly income

Determine the appropriate inferential procedure they would use to answer the following questions:

Research Questions

• 2 mean t-test/ matched pairs t-test /1 proportion z-test /1 sample t-test/ 2 proption z-test One average, do they make more than $75,000 per year?
• 2 mean t-test/ matched pairs t-test/ 1 proportion z-test /1 sample t-test/ 2 proption z-test Did more than 66% find a job as a physical therapist withing in the first year of graduating?
• 2 mean t-test/ matched pairs t-test/ 1 proportion z-test/ 1 sample t-test /2 proption z-test Are graduates of CSUF's program less likely to find employment than graduates of UCLA's program?
• 2 mean t-test / matched pairs t-test/ 1 proportion z-test/ 1 sample t-test /2 proption z-test Is the mean number of semesters spent in school longer for those who work full-time while in college versus those who work part time?

Question 5:

A researcher is investigating nursing in 2 states and gathers information on the following variables.

• State they work in (CA vs TX)
• Hourly salary
• Years of experience
• Education level (LPN, ASN, BSN, MSN, FNP)
• Job satisfaction (satisfied, not satisfied)

Determine the appropriate inferential procedure they would use to answer the following questions:

Research Questions

• 2-proption z-test/ 2-mean t-test /1-proportion z-test /matched pair t-test /1-mean t-interval On average, do nurses in California have more years of experience than nurses in Texas?
• 2-proption z-test /2-mean t-test /1-proportion z-test/ matched pair t-test /1-mean t-interval What is the mean salary of nurses in California?
• 2-proption z-test /2-mean t-test /1-proportion z-test / matched pair t-test/ 1-mean t-interval Do more than 60% of nurses have a BSN (Bachelor of Science in Nursing) in California?
• 2-proption z-test / 2-mean t-test /1-proportion z-test/ matched pair t-test /1-mean t-interval Is the percentage of nurses satisfied with their job lower in Texas than in California?

Question 6:

You are surveying Math majors (population M) and English majors (population E) on whether or not they own a laptop. You wish to test the following claim (Ha) at a significance level of =0.02 Ho:pM=pE Ha:pM>pE

Where p = the proportion of students with laptops You obtain 409 students with laptops in a sample of size n1=439 Math majors.

You obtain 347 students with laptops a sample of size n2=388 English majors. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = ____ What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = ____ The p-value is...

• less than (or equal to)
• greater than

This test statistic leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• The sample data support the claim that the proportion of Math majors with laptops is greater than the proportion of Engish majors with laptops.
• There is not sufficient sample evidence to support the claim that the proportion of Math majors with laptops is greater than the proportion of Engish majors with laptops.

Question 7:

A city is collecting data on two neighborhoods, one low income and one middle income, to see whether or not their residents would support an increase in local sales tax to pay for more city services. The city wishes to see if there is evidence to show there is a difference in proportion of support between the two neighborhoods . You wish to test the following claim (Ha) at a significance level of =0.02 Ho:p1=p2 Ha:p1p2 You obtain a random samples from both neighborhood:

The sample from the first neighborhood has 82 saying "Yes" and 397 saying "No".

The sample from the second neighborhood has 147 saying "Yes" and 419 saying "No".

What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = ____ What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = ____ The p-value is...

• less than (or equal to)
• greater than

This test statistic leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• There is sufficient evidence to reject there is a difference in proportion of support between the two neighborhoods .
• There is not sufficient evidence to reject there is a difference in proportion of support between the two neighborhoods .
• There sufficient evidence to support there is a difference in proportion of support between the two neighborhoods .
• There is not sufficient evidence to support there is a difference in proportion of support between the two neighborhoods .

Question 8:

You are testing the claim that the proportion of couples who own cats is larger than the proportion of single indivduals who own cats. You sample 60 couples, and 45% own cats. You sample 160 singles, and 75% own cats. Find the test statistic, rounded to two decimal places.

________