Question 1

Write the alternative hypothesis.

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Question 2

What is the critical z value for this test at

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Question 3

A marketing research company surveyed grocery shoppers in the east and west coasts to see the percentage of the customers who prefer chicken to other meat.The data are given below. $$\begin{array} { l c c } 
& \text { Sample size } & \begin{array} { c } 
\text { Number of customers in the } \
\text { sample that prefer chicken }
\end{array} \
\text { East Coast } & 492 & 156 \
\text { West Coast } & 386 & 172
\end{array}$$
-Is the proportion of customers who prefer chicken higher at the West Coast? Test at

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Question 4

Calculate the test statistic and test the claim at

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Question 5

A marketing research company surveyed grocery shoppers in the east and west coasts to see the percentage of the customers who prefer chicken to other meat.The data are given below. $$\begin{array} { l c c } 
& \text { Sample size } & \begin{array} { c } 
\text { Number of customers in the } \
\text { sample that prefer chicken }
\end{array} \
\text { East Coast } & 492 & 156 \
\text { West Coast } & 386 & 172
\end{array}$$
-Is the proportion of customers who prefer chicken the same for the two regions? Test at

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The answer of A marketing research company surveyed grocery shoppers...

Question 6

In an opinion survey, a random sample of 1000 adults from the USA and 1000 adults from Germany were asked whether they supported the death penalty. 590 American adults and 560 German adults indicated that they supported the death penalty. The researcher wants to know if there is sufficient evidence to conclude that the proportion of adults who support the death penalty is higher in the USA than in Germany.
-What is the decision at $\alpha$  = 0.10?

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Question 7

What is the p-value for this test?

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Question 8

What do you conclude about the waiting time for patients in the two hospitals?

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Question 9

A researcher wishes to test
$$H _ { 0 } : \mu _ { 1 } - \mu _ { 2 } = 0$$ 
versus $H _ { a } : \mu _ { 1 } - \mu _ { 2 } \neq 0$ 
.A sample of 50 observations from each population yields $\bar { x } _ { 1 }$ 
= 60 and $\bar { x } _ { 2 }$ 
= 52.If $\sigma _ { 1 }$ 
= 10 and $\sigma _ { 2 }$ 
= 8,compute Cohen's d.

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The answer of A researcher wishes to test
\[H _ {...

Question 10

Setup the null and alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men.

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Question 11

What is the critical z value for this test at

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Question 12

What is the decision at $Q$ = 0.05?

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Question 13

Calculate the test statistic for testing these hypothesis and then test the hypothesis at the .10,.05.01,and .001 levels of significance.

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Question 14

At $\alpha$ = 0.10,test the hypothesis that the proportion of Consumer (CON)industry companies winter quarter profit growth is more than 2% greater than the proportion of Banking (BKG)companies winter quarter profit growth,given that $\hat { p } _ { C O N }$ = 0.20, $\hat { p } _ { B K G }$ = 0.14,n_CON = 300,n_BKG = 400.

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The answer of At $\alpha$ 
= 0.10,test the hypothesis that...

Question 15

In an opinion survey, a random sample of 1000 adults from the USA and 1000 adults from Germany were asked whether they supported the death penalty. 590 American adults and 560 German adults indicated that they supported the death penalty. The researcher wants to know if there is sufficient evidence to conclude that the proportion of adults who support the death penalty is higher in the USA than in Germany.
-Write the null hypothesis.

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The answer of 	In an opinion survey, a random sample...

Question 16

In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine.
-What do you conclude?

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Question 17

A researcher wishes to test H₀: $\mu$ = 40 versus H_a: $\mu$ < 40.A sample of size n = 200 from a normally distributed population produces a sample mean of $\bar { x }$ = 36.The population standard deviation is $\sigma$ = 3.Compute Cohen's d.

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Question 18

What is the value of the test statistic for this test?

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Question 19

Let p₁ represent the population proportion of Canadian women who are in favour of a new modest tax on "junk food".Let p₂ represent the population proportion of Canadian men who are in favour of a new modest tax on "junk food".Out of the 265 women surveyed,106 of them are in favour of a "junk food" tax.Out of the 285 men surveyed,only 57 of them are in favour a "junk food" tax.At

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Question 20

Two hospital emergency rooms use different procedures for triage of their patients.We want to test the claim that the mean waiting time of patients is the same for both hospitals.The 40 randomly selected subjects from one hospital (hospital A)produce a mean of 18.3 minutes.The 50 randomly selected patients from the other hospital (hospital B)produce a mean of 25.31 minutes.Assume a σS1U1B1aS1U1B0 = 2.1 minutes and σS1U1B1bS1U1B0 = 2.92 minutes.
-Setup the null and alternative hypothesis to determine if there is a difference in the mean waiting time between the two hospitals.

Accepted Answer

The answer of Two hospital emergency rooms use different procedures...

Quiz 7: Confidence Intervals

Write the alternative hypothesis.

What is the critical z value for this test at

Calculate the test statistic and test the claim at

What is the p-value for this test?

What do you conclude about the waiting time for patients in the two hospitals?

Setup the null and alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men.

What is the critical z value for this test at

What is the decision at QQQ = 0.05?

Calculate the test statistic for testing these hypothesis and then test the hypothesis at the .10,.05.01,and .001 levels of significance.

In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine. -What do you conclude?

A researcher wishes to test H0: μ\muμ = 40 versus Ha: μ\muμ < 40.A sample of size n = 200 from a normally distributed population produces a sample mean of xˉ\bar { x }xˉ = 36.The population standard deviation is σ\sigmaσ = 3.Compute Cohen's d.

What is the value of the test statistic for this test?

What is the decision at $Q$ = 0.05?

A researcher wishes to test H₀: $\mu$ = 40 versus H_a: $\mu$ < 40.A sample of size n = 200 from a normally distributed population produces a sample mean of $\bar { x }$ = 36.The population standard deviation is $\sigma$ = 3.Compute Cohen's d.