9
Right tailed, mu.
10
two tailed, mu.
11
two taild,standard deviation
12
null hypothesis
13
left tailed, mu.
14
two tailed, standard deviation
15
Ho: p = .105
H1: p > .105
Type 1 error: Determining the true proportion p is greater then .105 when it is not.
Type 1 error: Determining the true proportion p is not greater then .105 when it is.
17
Ho: mu = $281,600
H1: mu< $218,600
the mean price of an existing single family home has decreased when the mean pice has not decreased
The evidence did not lead the real eastate broker to conclude that the mean proce of an existing single family home decreased when in fact the mean price did decrease
19
H: o = 0.7 psi
H: o < 0.7 psi
the variable in the pressure required is 0.7 psi when the true variabliity is is 0.7 psi
the variablility in the pressure required is 0.7psi when the variablity is less than than 0.7psi
21
H0: mu = $47.47 H1: mu does not equal $47.47
evidence led the researcher to believe the mean monthly cell bill is different from $47.47 when in fact the mean bill is $47.47
the evidence did not lead the researchers to believe the mean monthly cell phone bill is different from $47.47 but the mean bill is different from $47.47
7
np(1-9) is greater then or equal to 10.
The Pvalue = .0104
Reject the Null Hypothesis.
9
np= 37.1>10
The Pvalue = 0.2296
0.10 Reject the Null Hypothesis.
11
np= 45>10
The Pvalue = 0.1362
0.05 Reject the Null Hypothesis.
13
about 27 in 100 samples will give a sample proportion as high or higher than the one obtained if the population proportion really is 0.5. Becasue the probablility is not small we do not reject the null hypothesis. there is not enough significant evidence to conclude that the dart picking strategy resulted in a majority of winners.
15
The Pvalue = 0.2578
a= 0.01 do not reject the null hypothesis
17
The Pvalue = 0.1379
a=0.05; do not reject the null hypothesis
19
The Pvalue =0.0047
<a =0.05; reject the null hypothesis