Mathematics, 14.02.2020 00:04 annamcveigh50
A random sample of 15 employees was selected. The average age in the sample was 31 years with a variance of 49 years. Assuming ages are normally distributed, the 98% confidence interval for the population average age is . a. 26.26 to 35.74 b. 11.54 to 18.46 c. 25.62 to 36.38 d. 27.82 to 34.18
Answers: 1
= 7 years.
follows 
< 2.624) = 0.98 {because at 14 degree of freedom t table 
< 
< 2.624*
< xbar + 2.624*
, 
] 
Another question on Mathematics
Mathematics, 21.06.2019 14:30
Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0
Answers: 3
Mathematics, 21.06.2019 15:00
Listed in the table is the percentage of students who chose each kind of juice at lunchtime. use the table to determine the measure of the central angle you would draw to represent orange juice in a circle graph
Answers: 1
Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
Answers: 3
Mathematics, 21.06.2019 20:00
Which of the following is the inverse of y = 3∧x y = 1/3∧x y = ㏒3x y = (1/3) ∧x y = ㏒ 1/3∧x
Answers: 1
You know the right answer?
A random sample of 15 employees was selected. The average age in the sample was 31 years with a vari...
Questions
Biology, 10.03.2021 01:50
English, 10.03.2021 01:50
Mathematics, 10.03.2021 01:50
Biology, 10.03.2021 01:50
Mathematics, 10.03.2021 01:50
Mathematics, 10.03.2021 01:50
Biology, 10.03.2021 01:50
English, 10.03.2021 01:50
Mathematics, 10.03.2021 01:50
