In A Random Sample Of 23 People The Mean Commute Time To Work Was 34 2 Minutes A

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In a random sample of 23 ​people, the mean commute time to work was 34.2 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 98​% confidence interval for the population mean μ. What is the margin of error of μ​? Interpret the results.

9013.6

 
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In A Random Sample Of 25 People The Mean Commute Time To Work Was 34 3 Minutes A

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In a random sample of 25 people, the mean commute time to work was 34.3 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 99% confidence interval for the population mean. What is the margin of error of the mean? Interpret the results.

The confidence interval for the population mean is ___, ____?

The margin of error of the mean is ____?

 
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In A Random Sample Of 28 Families The Average Weekly Food Expense Was 95 60 With

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In a random sample of 28 families, the average weekly food expense was $95.60 with a standard deviation of $22.50. Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval. Assume the distribution of weekly food expenses is normally shaped.       

 
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In A Random Sample Of 35 Refrigerators The Mean Repair Cost Was 136 00 And The P

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In a random sample of ​refrigerators, the mean repair cost was ​$and the population standard deviation is ​$. Construct a ​% confidence interval for the population mean repair cost. Interpret the results. Construct a % confidence interval for the population mean repair cost.

The % confidence interval is ?, ?

Interpret you results. Choose the correct answer below.

A.With % confidence, it can be said that the confidence interval contains the true mean repair cost.

B.The confidence interval contains % of the mean repair costs.

C.With % confidence, it can be said that the confidence interval contains the sample mean repair cost.

 
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In A Random Sample Of 40 People Who Work In Vancouver The Average Commute Time F

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In a random sample of 40 people who work in Vancouver, the average commute time for people who use an active method of transportation (bike or walk) is analyzed. Assume that the distribution is approximately Normal. A hypothesis test is done to determine if the commute time is significantly less than 20 minutes using the hypotheses below:

H0: average commute time for people who work in Vancouver = 20 minutes

HA: average commute time for people who work in Vancouver < 20 minutes

The test statistic found was -2.780. What would the p-value for this hypothesis test be? Answer to four decimal places.

 
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In A Random Sample Of 50 Refrigerators The Mean Repair Cost Was 146 00 And The P

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In a random sample of 50 ​refrigerators, the mean repair cost was

​$146.00

and the population standard deviation is ​$17.80

.

Construct a 90​% confidence interval for the population mean repair cost. Interpret the results.

Construct a 90% confidence interval for the population mean repair cost.

The 90​% confidence interval is ( ? , ? )

​(Round to two decimal places as​ needed.)

I

nterpret you results. Choose the correct answer below.

A.With 90​% ​confidence, it can be said that the confidence interval contains the true mean repair cost.

B.With 90​% ​confidence, it can be said that the confidence interval contains the sample mean repair cost.

C.The confidence interval contains 90% of the mean repair costs.

 
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In A Random Sample Of Six Microwave Ovens The Mean Repair Cost Was 70 00 And The

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in a random sample of six microwave ovens, the mean repair cost was $70.00 and the standard deviation was $12.50. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence level for the population mean.

a) 90%=

b) what is the margin of error?

c) interpret the results?

 
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In A Randomized Clinical Trial To Determine The Most Effective Timing Of The Adm

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Please can you help me with this! I just want to check my answer.

. In a randomized clinical trial to determine the most effective timing of theadministration of chemotherapeutic drugs to lung cancer patients, 26 patients weregiven four drugs simultaneously, while 15 patients were given the same four drugssequentially. Objective response to the treatment (defined as the shrinkage of thetumor by at least 50%) was observed in 16 of the patients treated simultaneously andin 4 of the patients treated sequentially. a. Carry out the appropriate test to determine if there is a difference in effectivenessbetween the two different treatments. Include all steps for full credit. (6pt) b. Quantify the difference in effectiveness of the two treatments with the appropriatemeasure and interpret it in the context of the problem. (2pt)

 
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In A Randomized Comparative Experiment On The Effect Of Color On The Performance 1

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In a randomized comparative experiment on the effect of color on the performance of a cognitive task, researchers randomly divided 66 subjects (26 males and 40 females ranging in age from 17 to 25 years) into three groups. Participants were asked to solve a series of 6 anagrams. One group was presented with the anagrams on a blue screen; one group saw them on a red screen; and one group had a neutral screen. The time, in seconds, taken to solve the anagrams was recorded. The paper reporting the study gives x¯=11.66 and s=4.53 for the times of the 26 members of the neutral group.

(Give your answer to three decimal places.)

A 96 % confidence interval for the mean time in the population from which the subjects were recruited is from _____ to _____  seconds.

 
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In A Reaction Between Pure Acetic Acid And Sodium Bicarbonate 11 4 Grams Of Sodi

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In a reaction between pure acetic acid and sodium bicarbonate, 11.4 grams of sodium bicarbonate was added to 24 mL of acetic acid. Which reactant is the limiting reactant in this reaction?Name of limiting reactant (acetic acid or sodium bicarbonate): How many moles of the limiting reactant are present in this reaction?Moles of limiting reactant = molHow many moles of carbon dioxide do you expect to be produced?Moles of carbon dioxide = mol CO2If the temperature in the laboratory is 21.6oC and the atmospheric pressure is 1 atm, what volume would be occupied by the carbon dioxide produced in this reaction (in cm3)?Volume of carbon dioxide = cm3What would be the circumference of a spherical balloon containing this amount of carbon dioxide gas?Circumference of balloon = cm

 
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