Question

Test for a negative correlation using the sample correlation r=-0.39 and the sample size n=18.

State the null and alternative hypotheses.

Find the test statistic.

Round your answer to two decimal places.

t=

Find the p-value.

Round your answer to three decimal places.

The p-value is .

What is the conclusion, using a 5% significance level?

Do not
rejectReject H0.

Is the correlation significant?

YesNo

Answer #1

Test for evidence of a linear association using the sample
correlation r=0.68 and the sample size n=10.
State the null and alternative hypotheses.
Find the test statistic.
Round your answer to two decimal places.
t= Enter your answer; t
Find the p-value.
Round your answer to three decimal places.
The p-value is Enter your answer; p-value .
What is the conclusion, using a 5% significance level?
Choose the answer from the menu; What is the conclusion, using a...

Test for a positive correlation using the sample
correlationr=0.31and the sample sizen=30.
State the null and alternative hypotheses. Your answer should be
an expression composed of
symbols:=,≠,<,>,μ,μ1,μ2,p,p1,p2,0,1,ρ,p^,p^1,p^2,r.
H0: vs Ha
Find the test statistic.Round your answer to two decimal
places.
t=
Find the p-value.
Round your answer to three decimal places.
The p-value is
What is the conclusion, using a 5% significance level?
Choose the answer from the menu; What is the conclusion, using a 5%
significance level? ...

(a) Suppose n = 6 and the sample correlation
coefficient is r = 0.894. Is r significant at the
1% level of significance (based on a two-tailed test)? (Round your
answers to three decimal places.)
t
=
critical t
=
Conclusion:
Yes, the correlation coefficient ρ is significantly
different from 0 at the 0.01 level of significance.
No, the correlation coefficient ρ is not significantly
different from 0 at the 0.01 level of
significance.
(b) Suppose n = 10 and...

Consider the data.
xi
2
6
9
13
20
yi
7
18
10
26
25
(a)
What is the value of the standard error of the estimate? (Round
your answer to three decimal places.)
(b)
Test for a significant relationship by using the t
test. Use α = 0.05.
State the null and alternative hypotheses.
H0: β0 = 0
Ha: β0 ≠
0H0: β1 ≥ 0
Ha: β1 <
0 H0:
β1 ≠ 0
Ha: β1 =
0H0: β0 ≠ 0...

(a) Suppose n = 6 and the sample correlation coefficient is r =
0.908. Is r significant at the 1% level of significance (based on a
two-tailed test)? (Round your answers to three decimal places.) t =
critical t =
(b) Suppose n = 10 and the sample correlation coefficient is r =
0.908. Is r significant at the 1% level of significance (based on a
two-tailed test)? (Round your answers to three decimal places.) t =
critical t =

2. Use the normal distribution and the given sample results to
complete the test of the given hypotheses. Assume the results come
from a random sample and use a 5% significance level. Test H0 :
p=0.25 vs Ha : p<0.25 using the sample results p^=0.15 with
n=100 Round your answer for the test statistic to two decimal
places, and your answer for the p-value to three decimal
places.
test statistic = _____________________
p-value = _____________________
Conclusion: ______________________ (Rejct or Do...

Activity 2: Hypothesis
test from start to finish
Is there evidence of a negative
correlation between systolic blood pressure and heart rate? In a
sample of 200 patients, we found a sample correlation of
-0.057.
State the hypotheses of interest.
H0:
rho=0 rho<0
What is the notation and value of the sample statistic?
r
Use StatKey to generate a randomization distribution for these
hypotheses. Use the data set ‘ICU Admissions’ available on
StatKey.
What is the
p-value?
0.211
Which two...

Consider the following hypothesis test. H0: p ≥ 0.75 Ha: p <
0.75 A sample of 280 items was selected. Compute the p-value and
state your conclusion for each of the following sample results. Use
α = 0.05. (a) p = 0.67 Find the value of the test statistic. (Round
your answer to two decimal places.) Find the p-value. (Round your
answer to four decimal places.) p-value = State your conclusion. Do
not reject H0. There is sufficient evidence to...

Consider the following data for a dependent variable y
and two independent variables, x1and
x2.
x1
x2
y
30
12
96
47
10
108
25
17
112
51
16
178
40
5
94
51
19
175
74
7
170
36
12
117
59
13
142
76
16
211
The estimated regression equation for these data is ŷ =
−17.33 + 2.00x1 +
4.73x2.
Here, SST = 15,002.1, SSR = 13,887.5,
sb1 =
0.2454,and
sb2 =
0.9417.
(a)Test for a significant...

Consider the data.
xi
2
6
9
13
20
yi
5
16
8
24
23
(a)
What is the value of the standard error of the estimate? (Round
your answer to three decimal places.)
(b)
Test for a significant relationship by using the t
test. Use α = 0.05.
State the null and alternative hypotheses.
H0: β0 ≠ 0
Ha: β0 = 0
H0: β1 ≠ 0
Ha: β1 =
0
H0: β1 = 0
Ha: β1 ≠ 0
H0:...

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