29% of car crashes occur within 2 miles of the motorists home. A researcher thinks it has decreased. a) Express the null and alternative hypotheses in symbolic form for this claim. When entering the decimal enter the zero before the decimal point. For example, if you have 35%, enter it as 0.35. H0:H0: Ha:Ha: Use the following codes to enter the following symbols: ≥≥ enter >= ≤≤ enter <= ≠≠ enter != b) You decide to survey 100 adult Americans and find that 70 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= d) Make a decision base on a 0.05 significance level. Do not reject the null Reject the null e) What is the conclusion? There is sufficient evidence to support the claim that 29 % of car crashes occur within 2 miles of the motorists home has decreased There is not sufficient evidence to support the claim that 29 % of car crashes occur within 2 miles of the motorists home has decreased
29% of car crashes occur within 2 miles of the motorists home. A researcher thinks it has decreased.
a) Express the null and alternative hypotheses in symbolic form for this claim. When entering the decimal enter the zero before the decimal point. For example, if you have 35%, enter it as 0.35.
H0:H0:
Ha:Ha:
Use the following codes to enter the following symbols:
≥≥ enter >=
≤≤ enter <=
≠≠ enter !=
b) You decide to survey 100 adult Americans and find that 70 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=
d) Make a decision base on a 0.05 significance level.
- Do not reject the null
- Reject the null
e) What is the conclusion?
- There is sufficient evidence to support the claim that 29 % of car crashes occur within 2 miles of the motorists home has decreased
- There is not sufficient evidence to support the claim that 29 % of car crashes occur within 2 miles of the motorists home has decreased
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