# Question: at least 049 of car crashes occur within 2 miles...

###### Question details

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.

z=z=

c) What is the p-value? Round to 4 decimals.

p=p=

Based on a sample of 700 people, 55% owned cats

The test statistic is: (to 2 decimals)

The p-value is: (to 4 decimals)

Based on a sample of 400 people, 87% workers got their job
through networking

The test statistic is: (to 2 decimals)

The p-value is: (to 4 decimals)

The average student loan debt is reported to be $25,235. A
student belives 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 to be $27,524 and the standard devition to be
$6000. Is there sufficient evidence to support the student' claim
at a 5% significance level?

a) Determine the null and alternative hypotheses.

H0H0: μ=μ=

HaHa: μμSelect an answer > not = < (Put in
the correct symbol and value)

b) Determine the test statistic. Round to two decimals.

t=t=

c) Find the p-value. Round to 4 decimals.

P-value =

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) Determine the null and alternative hypotheses.

H0 p=

HaH: pp

Select an answer not = < > (Put in the
correct symbol and value)

b) Determine the test statistic. Round to two decimals.

z=z=

c) Find the p-value. Round to 4 decimals.

P-value =