A95% confidence interval for a population mean μ is given as (18.7, 21.3). this confidence interval is based on a simple random sample of 48 observations. calculate the sample mean and sample standard deviation. assume that all conditions necessary for inference are satisfied. use the excel function t. inv as necessary to obtain values from the t-distribution in any calculations and give all answers to 3 decimal places.

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3

if she was to only spend a dollar she can get 1lb

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thats one

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i would be 2,000 just get the square root of 50 which is 2500 and the divid 4/5 and last thing multiply the answer you get for that by the square root of 50

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