1.In a view, 32%
of the respondents formal that they converse to their pets on the answering muniment or telephone. A veterinarian believed this product to be too eminent, so
hehe
randomly selected
250
pet owners and discovered that
70
of them spoke to their pet on the answering muniment or telephone. Does the veterinarian enjoy a upupright to beskeptical? Use the
alphaαequals=0.05
level of sentiment.
2.Test the conjecture using the elegant approximation and the P-compute approximation.
Upper H 0 : p equals 0.45 versus Upper H 1 : p less than 0.45H0: p=0.45 versus H1: p<0.45
n equals 150 comma x equals 62 comma alpha equals 0.05
Complete talents (a) through (c) adown.
(a) Determine the critical compute(s) for a upright-tailed cupel of a population balance at the alphaαequals=0.05
level of sentiment after a while 20
degrees of immunity.
(b) Determine the critical compute(s) for a left-tailed cupel of a population balance at the alphaαequals=0.05
level of sentiment grounded on a exemplification dimension of nequals=15
(c) Determine the critical compute(s) for a two-tailed cupel of a population balance at the alphaαequals=0.01
level of sentiment grounded on a exemplification dimension of nequals=18
To cupel Upper H 0H0:
muμequals=100
versus Upper H 1H1:
muμnot equals≠100,
a humble haphazard exemplification dimension of nequals=18
is obtained from a population that is known to be normally arranged. Answer talents(a)-(d).
Several years ago, the reputed balance age of an resident on fall row was 42.6 years. A sociologist wondered whether the balance age of a fall-row resident has radical gone then. HeHe haphazardly selects 4141 death-row residents and finds that their balance age is 40.8, after a while a plummet deflexion of 10.5. Construct a90% trust gap encircling the balance age of fall row residents. What does the gap hint?
Choose the punish hypotheses.
