Question

Question Overall, the amount of days attended (per summer) is normally distributed around 35 days with a standard deviation of 4 days What's the probability that the number of attended days will be above 28? What percentile does an attendance of 35 days rank at? What is the probability of attending between 33 and 39 days? The parents with children at or below the 10%ile of number of days attended need to bring an explanatory note. What will be the threshold of 10%? How likely (what is the probability) is it to have the number of days attended less than 30? Children that are in the top 15% of attendance will receive a ticket to see the BubbleClown. What is the minimum number of days of attendance in order to receive such a ticket? If 49 children (49 size of the sample) selected randomly attend the summer camp, what's the likelihood that their mean number of attended days will be within 2 days of the population mean?

Answer 1

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RGui (32-bit) File Edit Packages Windows Help RR Console R Untitled-REditor 1-pnorm (28,35, 4) pnorm (35,35, 4) pnorm (39,35,4) -pnorm (33,35, 4) qnorm(0.1,35, 4) pnorm(30, 35, 4) qnorm (0.85,35, 4) pnorm(37,35, 4/7) -pnorm (33, 35, 4/7) > 1-pnorm (28,35, 4) [1] 0.9599408 > pnorm (35,35, 4) [1] 0.5 > pnorm (39,35, 4) -pnorm (33, 35, 4) [1 0.5328072 qnorm (0.1,35,4) [1] 29.87379 > pnorm (30, 35, 4) [1 0.1056498 qnorm (0.85, 35, 4) [1] 39.14573 > pnorm (37,35, 4/7) -pnorm (33, 35, 4/7) [1] 0.9995347