n 2011, a U.S. Census report determined that 71% of college
students work. A researcher thinks this percentage has changed
since then. A survey of 110 college students reported that 91 of
them work. Is there evidence to support the reasearcher's claim at
the 1% significance level? A normal probability plot indicates that
the population is normally distributed.
a) Determine the null and alternative hypotheses.
H0: p=
Ha: p Select an answer not = ,< ,> (Put in
the correct symbol and value)
b) Determine the test statistic. Round to two decimals.
z=
c) Find the p-value. Round to 4 decimals.
P-value =
d) Make a decision.
e) Write the conclusion.
n 2011, a U.S. Census report determined that 71% of college students work. A researcher thinks...
In 2011, a U.S. Census report determined that 71% of college students work. A researcher thinks this percentage has changed since then. A survey of 110 college students reported that 91 of them work. Is there evidence to support the reasearcher's claim at the 1% significance level? A normal probability plot indicates that the population is normally distributed. a) Determine the null and alternative hypotheses. Ho: p = H:P Select an answer (Put in the correct symbol and value) b)...
A researcher claims that the proportion of college students who plan to participate in community service after graduation is greater than 35%. To test this claim, a survey asked 500 randomly selected college students if they planned to perform community service after graduation. Of those students, 195 indicated they planned to perform community service. The following is the setup m the following hypothesis test: H0:p=0.35 Ha:p>0.35 In this example, the p-value was determined to be 0.030. Come to a conclusion...
At least 0.49 of car crashes occur within 2 miles of the motorists home. a) Express the null and alternative hypotheses in symbolic form for this claim. Ho: p= Ha: Use the following codes to enter the following symbols: ≥≥ enter >= ≤≤ enter <= ≠≠ enter != b) You decide to survey 100 adult Americans and find that 10 of car crashes occur within 2 miles of the motorists home. Find the test statistic. Round to two decimal places....
An education researcher claims that 54% of college students work year-round. In a random sample of 200 college students, 108 say they work year-round. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do...
The average student-loan debt is reported to be $25,235. A student believes that the student-loan debt is higher in her area. She takes a random sample of 100 college students in her area and determines the mean student-loan debt is $27,524 and the standard deviation is $6,000. Is there sufficient evidence to support the student's claim at a 5% significance level? Preliminary: Is it safe to assume that n≤5% of all college students in the local area? Yes No Is...
The accuracy of a census report on a city in southern California was questioned by some government officials. A random sample of 1215 people living in the city was used to check the report, and the results are shown below. Ethnic Origin Census Percent Sample Result Black 10% 130 Asian 3% 35 Anglo 38% 462 Latino/Latina 41% 516 Native American 6% 62 All others 2% 10 Using a 1% level of significance, test the claim that the census distribution and...
18% of all college students volunteer their time. Is the percentage of college students who are volunteers larger for students receiving financial aid? Of the 301 randomly selected students who receive financial aid, 72 of them volunteered their time. What can be concluded at the αα = 0.10 level of significance? For this study, we should use Select an answer t-test for a population mean z-test for a population proportion The null and alternative hypotheses would be: H0:H0: ? p...
The accuracy of a census report on a city in southern California was questioned by some government officials. A random sample of 1215 people living in the city was used to check the report, and the results are shown below. Ethnic Origin Census Percent Sample Result Black 10% 128 Asian 3% 45 Anglo 38% 478 Latino/Latina 41% 492 Native American 6% 60 All others 2% 12 Using a 1% level of significance, test the claim that the census distribution and...
PLEASE EXPLAIN HOW TO SOLVE IT WITH EXCEL 1) A researcher wanted to determine which method would help smokers quit smoking. He divided a group of 183 smokers into three groups: Group 1 is given a patch, Group 2 is given oral medication, and Group 3 has no intervention. The results of the study are in the below table. Group 1 Group 2 Group 3 Did Not Quit 52 54 51 Quit 13 9 4 *Source: Harris Poll Determine the...
An education researcher claims that at most 8% of working college students are employed as teachers or teaching assistants. In a random sample of 200 working college students, 10% are employed as teachers or teaching assistants. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer...