Mathematics, 18.10.2020 15:01, arianna23717
A survey of 120 college students is conducted and the results displayed below show that 80 students have a smartphone, 65 have a tablet, and 10 have neither. Fill in the empty table cells in the two-way frequency table.
SmartphoneNo SmartphoneTotal
Tablet 65
No Tablet 10
Total80 120
What is the probability (rounded to the nearest whole percent) that a randomly selected college student has a tablet but not a smartphone? (4 points)
a
25%
b
30%
c
54%
d
38%
Answers: 3
Mathematics, 21.06.2019 17:20, ryleepretty
Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?
Answers: 2
Mathematics, 21.06.2019 21:40, oprajapati
The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?
Answers: 2
A survey of 120 college students is conducted and the results displayed below show that 80 students...
Business, 05.05.2020 00:48
Biology, 05.05.2020 00:48
Business, 05.05.2020 00:48
Mathematics, 05.05.2020 00:48
Arts, 05.05.2020 00:48
History, 05.05.2020 00:48