According to the Institute of Medicine, the tolerable upper level of sodium intake for adults and adolescents is 2300 mg per day. A dietitian believes that the average level of sodium intake of students in a local school differs from the national standard. The sodium intake of a random sample of 14 adolescent students was 2310 mg per day with a standard deviation of 38 mg. Is there enough evidence in the data to back up the researcher's claim? Assume that the level of significance is 3%. a) State what u is in words and determine the Ho and Ha. b) Find the t-test statistic and P-value. i) Draw a density curve for x and a t density curve. c) Fill in the blanks: Since P-value is < or >? 0.03, we reject or do not reject Ho?. We have enough or not enough? evidence to conclude that (state Ha in words) at 3%.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.