Question

H0:p=0.69H0:p=0.69

H1:p<0.69H1:p<0.69

Your sample consists of 129 subjects, with 95 successes. Calculate
the test statistic, rounded to 2 decimal places

z=

Answer #1

**SOLUTION**

= 0.69

1 - = 0.31

n = 129

x = 95

Point estimate = sample proportion = = x / n = 95 / 129 = 0.7364

Test statistics

z = ( - ) / *(1-) / n

= ( 0.7364 - 0.69) / (0.69*0.31) /129

= 1.14

The test statistic is 1.14

Testing:
H0:p=0.5369H0
H1:p≠0.5369
Your sample consists of 93 subjects, with 49 successes. Calculate
the test statistic, rounded to 2 decimal places
z=

Testing:
H0:p=0.81H0:p=0.81
H1:p≠0.81H1:p≠0.81
Your sample consists of 115 subjects, with 88 successes. Calculate
the test statistic, rounded to 2 decimal places
z=____

1)
H0:p=0.54H0:p=0.54
H1:p<0.54H1:p<0.54
Your sample consists of 88 subjects, with 47 successes. Calculate
the test statistic, rounded to 2 decimal places
z=
2) A well-known brokerage firm executive claimed that
at least 43 % of investors are currently confident of meeting their
investment goals. An XYZ Investor Optimism Survey, conducted over a
two week period, found that out of 106 randomly selected people, 41
of them said they are confident of meeting their goals.
Suppose you are have the following null...

1.
H 0 : p = 0.73
H 1 : p ≠ 0.73
Your sample consists of 83 subjects, with 59 successes.
Calculate the test statistic, rounded to 2 decimal places z
=_________________
2.
Testing:
H0:μ=27.5
H1:μ<27.5
Your sample consists of 22 subjects, with a mean of 26.1 and
standard deviation of 4.55.
Calculate the test statistic, rounded to 2 decimal places.
t=__________

Testing: H0:μ= 38.375 H1: μ> 38.375 Your sample consists of
40 subjects, with a mean of 39.9 and a sample standard deviation
(s) of 4.65. Calculate the test statistic, rounded to 2 decimal
places. t=?

Testing:
H0:μ=6.915
H1:μ≠6.915
Your sample consists of 101 subjects, with a mean of 6.6 and
standard deviation of 3.77.
Calculate the test statistic, rounded to 2 decimal places.
t=_______________

H0:μ=11.8H0:μ=11.8
H1:μ<11.8H1:μ<11.8
Your sample consists of 306 subjects, with a mean of 11.5 and
standard deviation of 4.72.
Calculate the test statistic, rounded to 2 decimal places.

H0:μ=12.7H0:μ=12.7
H1:μ<12.7H1:μ<12.7
Your sample consists of 34 subjects, with a mean of 12.5 and
standard deviation of 1.42.
Calculate the test statistic, rounded to 2 decimal places.
t=t=

Testing:
H0:μ=15.08H0:μ=15.08
H1:μ>15.08H1:μ>15.08
Your sample consists of 25 subjects, with a mean of 15.2 and
standard deviation of 2.24.
Calculate the test statistic, rounded to 2 decimal places.
t=

H 0 : p = 0.52
H 1 : p < 0.52
Your sample consists of 147 subjects, with 69 successes.
Calculate the test statistic, rounded to 2 decimal places

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