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
pet owners and discovered that
of them spoke to their pet on the answering muniment or telephone. Does the veterinarian enjoy a upupright to beskeptical? Use the
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:
versus Upper H 1H1:
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.