An ambulance service claims that the proportion, p, of calls received that involve life-threatening emergencies is greater than 52%. Can we support this claim at the 0.01 level of significance, if 97 calls out of a random sample of 180 calls selected from the service's files involved life-threatening emergencies? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H,. H, :0 H, :0 (b) Determine the type of test statistic to use. (Choose one) ▼ D=0 OSO (c) Find the value of the test statistic. (Round to three or more decimal places.) O

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An ambulance service claims that the proportion, p, of calls received that involve life-threatening emergencies is greater than 52%. Can we support this claim at
the 0.01 level of significance, if 97 calls out of a random sample of 180 calls selected from the service's files involved life-threatening emergencies?
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of
formulas.)
(a) State the null hypothesis Ho and the alternative hypothesis H.
p
H, :0
H :0
|(b) Determine the type of test statistic to use.
(Choose one) ▼
D=0
OSO
O20
|(c) Find the value of the test statistic. (Round to three or more decimal places.)
(d) Find the critical value. (Round to three or more decimal places.)
(e) Can we support the claim that the proportion of calls received that involve
life-threatening emergencies is greater than 52%?
OYes ONo
Transcribed Image Text:An ambulance service claims that the proportion, p, of calls received that involve life-threatening emergencies is greater than 52%. Can we support this claim at the 0.01 level of significance, if 97 calls out of a random sample of 180 calls selected from the service's files involved life-threatening emergencies? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H. p H, :0 H :0 |(b) Determine the type of test statistic to use. (Choose one) ▼ D=0 OSO O20 |(c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the critical value. (Round to three or more decimal places.) (e) Can we support the claim that the proportion of calls received that involve life-threatening emergencies is greater than 52%? OYes ONo
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