dont need explain, just result

Question 3:

Consider the hypotheses: H0:=52.98 HA:>52.98 Your sample consists of 24 subjects, with a mean of 54 and a sample standard deviation (s) of 2.84. Calculate the test statistic. Round to at least 2 decimal places. t=_____ Calculate the test statistic. Round to at least 3 decimal places. Pay attention to whether the we have a one-tailed or two-tailed alternative. pvalue=______

Question 6:

Testing: H0:=21.04 H1:>21.04 Your sample consists of 47 subjects, with a mean of 21.6 and standard deviation of 1.12. Calculate the test statistic, rounded to 2 decimal places t=______

Question 7:

You wish to test the following claim (HaHa) at a significance level of =0.001=0.001. Ho:=77.7 Ha:>77.7 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=566 with mean x=78 and a standard deviation of s=8.6 What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic =______ What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =______ The p-value is...

• less than (or equal to)
• greater than

This test statistic leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• There is sufficient evidence to warrant rejection of the claim that the population mean is greater than 77.7.
• There is not sufficient evidence to warrant rejection of the claim that the population mean is greater than 77.7.
• The sample data support the claim that the population mean is greater than 77.7.
• There is not sufficient sample evidence to support the claim that the population mean is greater than 77.7.

Question 8:

You wish to test the following claim (H1H1) at a significance level of =0.05 H0:=60.4 H1:>60.4 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=11 with mean x=64.7 and a standard deviation of s=17.8 What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is...

• less than (or equal to)
• greater than

This test statistic leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• There is sufficient evidence to warrant rejection of the claim that the population mean is greater than 60.4.
• There is not sufficient evidence to warrant rejection of the claim that the population mean is greater than 60.4.
• The sample data support the claim that the population mean is greater than 60.4.
• There is not sufficient sample evidence to support the claim that the population mean is greater than 60.4.

Question 9:

Test the claim that the mean GPA of night students is larger than 3.3 at the 0.05 significance level. The null and alternative hypothesis would be:

H0:p=0.825 HA:p0.825

H0:=3.3 HA:<3.3

H0:p=0.825 HA:p>0.825

H0:=3.3 HA:3.3

H0:p=0.825 HA:p<0.825

H0:=3.3 HA:>3.3 The test is:

A. two-tailed B. left-tailed C. right-tailed Based on a sample of 60 people, the sample mean GPA was 3.34 with a standard deviation of 0.07 The test statistic is: _____(Round to 2 decimal places.) The p-value is: ______ (Round to 4 decimal places.) Based on this we:

A. Reject the null hypothesis

B. Fail to reject the null hypothesis

Question 10:

Test the claim that the mean GPA of night students is significantly different than 2.1 at the 0.01 significance level. The null and alternative hypothesis would be:

H0:p=0.525 HA:p0.525

H0:=2.1 HA:2.1

H0:p=0.525 HA:p>0.525

H0:p=0.525 HA:p<0.525

H0:=2.1 HA:>2.1

H0:=2.1 HA:<2.1 The test is:

A. right-tailed B. two-tailed C. left-tailed Based on a sample of 20 people, the sample mean GPA was 2.06 with a standard deviation of 0.06. The p-value is:_______ (to 2 decimals) Based on this we:

• Reject the null hypothesis
• Fail to reject the null hypothesis

Question 11:

You wish to test the following claim (HaHa) at a significance level of =0.01=0.01. Ho:=82.2 Ha:<82.2 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=20 with mean x=76.5 and a standard deviation of s=13.3. What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =_______ The p-value is...

• less than (or equal to)
• greater than

This p-value leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• There is sufficient evidence to warrant rejection of the claim that the population mean is less than 82.2.
• There is not sufficient evidence to warrant rejection of the claim that the population mean is less than 82.2.
• The sample data support the claim that the population mean is less than 82.2.
• There is not sufficient sample evidence to support the claim that the population mean is less than 82.2.

Question 12:

A shareholders' group is lodging a protest against your company. The shareholders group claimed that the mean tenure for a chief exective office (CEO) was at least 11 years. A survey of 103 companies reported in The Wall Street Journal found a sample mean tenure of 10.6 years for CEOs with a standard deviation of s= 5.4 years (The Wall Street Journal, January 2, 2007). You don't know the population standard deviation but can assume it is normally distributed. You want to formulate and test a hypothesis that can be used to challenge the validity of the claim made by the group, at a significance level of =0.02. Your hypotheses are: Ho:=11 Ha:<11 what is the test statistic for this sample? test statistic =_____ (Report answer accurate to 3 decimal places.) What is the p-value for this sample? p-value =________ (Report answer accurate to 4 decimal places.) The p-value is...

• less than (or equal to)
• greater than

This test statistic leads to a decision to...

• reject the null
• accept the null
• fail to reject the null

As such, the final conclusion is that...

• There is sufficient evidence to warrant rejection of the claim that the population mean is less than 11.
• There is not sufficient evidence to warrant rejection of the claim that the population mean is less than 11.
• The sample data support the claim that the population mean is less than 11.
• There is not sufficient sample evidence to support the claim that the population mean is less than 11.

Question 13:

Test the claim that the mean GPA of night students is significantly different than 2.2 at the 0.02 significance level. The null and alternative hypothesis would be:

H0:p=0.55 HA:p>0.55

H0:=2.2 HA:2.2

H0:p=0.55 HA:p0.55

H0:p=0.55 HA:p<0.55

H0:=2.2 HA:<2.2

H0:=2.2 HA:>2.2 The test is:

A. left-tailed B. right-tailed C. two-tailed Based on a sample of 70 people, the sample mean GPA was 2.16 with a standard deviation of 0.03 The test statistic is:______ (Round to 2 decimal places.) The p-value is:______ (Round to 4 decimal places.) Based on this we:

• Fail to reject the null hypothesis
• Reject the null hypothesis

Fill in the conclusion: There is insufficient/sufficient evidence to show that the mean GPA of night students is different from/ less than/the same as/ greater than