Laptop Computers and Sperm Count Studies have shown that heating the scrotum by just 1∘C can reduce sperm count and sperm quality, so men concerned about fertility are cautioned to avoid too much time in the hot tub or sauna. A new study1 suggests that men also keep their laptop computers off their laps. The study measured scrotal temperature in 29 healthy male volunteers as they sat with legs together and a laptop computer on the lap. Temperature increase in the left scrotum over a 60-minute session is given as 2.31±0.96 and a note tells us that "Temperatures are given as ∘ C; values are shown as mean ±SD." The abbreviation SD stands for standard deviation. (Men who sit with their legs together without a laptop computer do not show an increase in temperature.) 1Sheynkin, Y., et al., "Protection from scrotal hyperthermia in laptop computer users," Fertility and Sterility, February 2011; 92(2): 647–651. Condition gt requires numbers instead of "null" and "0" (a) If we assume that the distribution of the temperature increases for the 29 men is symmetric and bell-shaped, find an interval that we expect to contain about 95% of the temperature increases. Round your answers to two decimal places. The interval is Enter your answer in accordance to item (a) of the question statement∘ to Enter your answer in accordance to item (a) of the question statement∘. Condition gt requires numbers instead of "null" and "0" (b) Find the z-score for one of the men, who had a temperature increase of 4.9∘. Round your answer to two decimal places. z-score = Enter your answer in accordance to the question statement the tolerance is +/-2%
Laptop Computers and Sperm Count
Studies have shown that heating the scrotum by just 1∘C can reduce sperm count and sperm quality, so men concerned about fertility are cautioned to avoid too much time in the hot tub or sauna. A new study1 suggests that men also keep their laptop computers off their laps. The study measured scrotal temperature in 29 healthy male volunteers as they sat with legs together and a laptop computer on the lap. Temperature increase in the left scrotum over a 60-minute session is given as 2.31±0.96 and a note tells us that "Temperatures are given as ∘ C; values are shown as mean ±SD." The abbreviation SD stands for standard deviation. (Men who sit with their legs together without a laptop computer do not show an increase in temperature.)
1Sheynkin, Y., et al., "Protection from scrotal hyperthermia in laptop computer users," Fertility and Sterility, February 2011; 92(2): 647–651.
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Condition gt requires numbers instead of "null" and "0"
(b) Find the z-score for one of the men, who had a temperature increase of 4.9∘.
Round your answer to two decimal places.
z-score = Enter your answer in accordance to the question statement
the tolerance is +/-2%
a)
Mean
Standard deviation
The 95% of data will occur in 2 standard deviation within mean,
We estimate that about 95% of the temperature increase will lie between and .
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