Suppose a gym reports that the average number of visitors per day is [a], with a standard deviation of [b] visitors. Consider a random sample of [c] days. (Round to 3 decimal places as needed) Calculate the standard deviation of the sample mean number of visitors (aka calculate the standard error).
Read DetailsA nutritionist is interested in whether there is a difference in the mean daily protein intake of vegetarians and non-vegetarians. The nutritionist randomly selected 28 vegetarians and 32 non-vegetarians and recorded their daily protein intake. Vegetarians had an average protein intake of 62.3 grams with a standard deviation of 8.1 grams. Non-vegetarians had an average protein intake of 68.7 grams with a standard deviation of 9.2 grams. Assume the population standard deviations are not equal. Use a 0.05 level of significance to test whether there is a difference in mean daily protein intake.(1 = Vegetarians, 2 = Non-vegetarians) a. What type of test is this? [a] b. Given the following information in the table below, make a decision: The p-value = [e]. Thus, the p-value is [b] alpha (the significance level), so we [c]. There [d] enough evidence to conclude that there is a difference in the mean daily protein intake of vegetarians and non-vegetarians.
Read DetailsSarah is conducting a research study in which one group of participants consumes one cup of coffee, whereas another group of participants consumes two cups of coffee. Then, she assesses attention levels of these participants following coffee consumption. This is an example of a(n) [blank] research study.
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