A researcher is interested in investigating whether people perform better at dexterity tests while listening to classical music or with no music. He designs a dexterity test which he intends to give to participants with and without classical music playing. Do you think that a paired , a two-sample , a paired Z-test, or a two sample Z-test would be more appropriate in this situation

Paired t test

Step-by-step explanation:

In the scenario given above, the paired t test will be more appropriate simply because of the natural pairing which exists. Two different results can be obtained from each of the subjects, thus creating a natural pair. Since the same subject are exposed to both treatment, thus we have a test result obtained with classical music playing and another test result while classical music isn't playing both from each single subject. Hence, making it the more appropriate test for the situation described.

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0