Homework Answers
Here I have assumed both the variances from 2 samples are different.
If both variances are equal then procedure will be slightly different.
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The mean voltage and standard deviation of 13 batteries from each manufacturer were measured. The results...
The mean voltage and standard deviation of 10 batteries from each manufacturer were measured. The results...
The mean voltage and standard deviation of 10 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 160 4 . В 158 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 250 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the...
Jump to level 1 The mean voltage and standard deviation of 17 batteries from each manufacturer...
Jump to level 1 The mean voltage and standard deviation of 17 batteries from each manufacturer were measured. The results are summarized in the following table. 2 Manufacturer Sample mean voltage (millivolts) Sample standard deviatio А 171 B 169 3 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex 250 Does sufficient evidence exist to support the claim that the voltage of the batteries...
Jump to level 1 The mean voltage and standard deviation of 14 batteries from each manufacturer...
Jump to level 1 The mean voltage and standard deviation of 14 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 173 4 B 170 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 250 Does sufficient evidence exist to support the claim that the voltage of the batteries...
< Jump to level 1 The mean voltage and standard deviation of 7 batteries from each...
< Jump to level 1 The mean voltage and standard deviation of 7 batteries from each manufacturer were measured. The results are summarized in the following table. 2 3 Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 161 3 B 157 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 0 What is the number of degrees of freedom? Ex 250 Does sufficient evidence exist to support the claim that the...
Jump to level 1 2 The mean voltage and standard deviation of 5 batteries from each...
Jump to level 1 2 The mean voltage and standard deviation of 5 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio 3 А 126 5 B 119 4 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 0 What is the number of degrees of freedom? Ex: 259 Does sufficient evidence exist to support the claim that the voltage...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. > Jump to level...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. > Jump to level 1 The mean voltage and standard deviation of 5 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 167 B 164 3 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex 250 Does sufficient...
im stuck at finding the number of degrees of freedom Jump to level 1 The mean...
im stuck at finding the number of degrees of freedom
Jump to level 1 The mean voltage and standard deviation of 17 batteries from each manufacturer were measured. The results are summarized in the following table. 3 Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 171 2 B 169 3 What type of hypothesis test should be performed? Two-tailed z-test What is the test statistic? 2.550 What is the number of degrees of freedom? Ex: 250 Does sufficient evidence...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. Jump to level 1...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. Jump to level 1 An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 130 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. 3 Manufacturer Sample mean voltage (millivolts) Population standard deviati A 197 4 B 196 2 What type of hypothesis...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. Start An electrician wants...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. Start An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 95 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. D-D-D- 3 Manufacturer Sample mean voltage (millivolts) Population standard deviat A 125 5 B 124 3 What type of hypothesis test should...
idk if its a left tailed or right tailed z test, or a left tailed t...
idk if its a left tailed or right tailed z test, or a left
tailed t test, or a two tailed z test. Im also having trouble
finding the p value
A political campaign is interested in whether city 1 has more support for raising the minimum wage than city 2. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1, a poll of 800 randomly selected voters found that 220...
The mean voltage and standard deviation of 10 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 160 4 . В 158 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 250 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the...
Jump to level 1 The mean voltage and standard deviation of 17 batteries from each manufacturer were measured. The results are summarized in the following table. 2 Manufacturer Sample mean voltage (millivolts) Sample standard deviatio А 171 B 169 3 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex 250 Does sufficient evidence exist to support the claim that the voltage of the batteries...
Jump to level 1 The mean voltage and standard deviation of 14 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 173 4 B 170 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 250 Does sufficient evidence exist to support the claim that the voltage of the batteries...
< Jump to level 1 The mean voltage and standard deviation of 7 batteries from each manufacturer were measured. The results are summarized in the following table. 2 3 Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 161 3 B 157 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 0 What is the number of degrees of freedom? Ex 250 Does sufficient evidence exist to support the claim that the...
Jump to level 1 2 The mean voltage and standard deviation of 5 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio 3 А 126 5 B 119 4 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 0 What is the number of degrees of freedom? Ex: 259 Does sufficient evidence exist to support the claim that the voltage...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. > Jump to level 1 The mean voltage and standard deviation of 5 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 167 B 164 3 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex 250 Does sufficient...
im stuck at finding the number of degrees of freedom
Jump to level 1 The mean voltage and standard deviation of 17 batteries from each manufacturer were measured. The results are summarized in the following table. 3 Manufacturer Sample mean voltage (millivolts) Sample standard deviatio A 171 2 B 169 3 What type of hypothesis test should be performed? Two-tailed z-test What is the test statistic? 2.550 What is the number of degrees of freedom? Ex: 250 Does sufficient evidence...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. Jump to level 1 An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 130 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. 3 Manufacturer Sample mean voltage (millivolts) Population standard deviati A 197 4 B 196 2 What type of hypothesis...
CHALLENGE ACTIVITY 5.7.1: Hypothesis test for the difference between two population means. Start An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 95 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. D-D-D- 3 Manufacturer Sample mean voltage (millivolts) Population standard deviat A 125 5 B 124 3 What type of hypothesis test should...
idk if its a left tailed or right tailed z test, or a left
tailed t test, or a two tailed z test. Im also having trouble
finding the p value
A political campaign is interested in whether city 1 has more support for raising the minimum wage than city 2. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1, a poll of 800 randomly selected voters found that 220...
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