Una empresa de telefonos decide realizar una encuesta telefonica entre los abonados de una ciudad (unicamente casas flia), para indagar sobre diversos aspectos del servicio. a continuacion se listan los datos solicitados a los encuestados, indique en cada caso que tipo de dato es:
1) cantidad de aparatos telefonicos en la casa.
2)modelo del aparato telefonico,(da varias opciones).
3) facturacion del ultimo mes.
4) ocupacion del sosten economico de la familia.
5) numero de integrantes del grupo familiar.
6) barrio en que esta ubicada la vivienda

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Can someone me with this problem . show your work .

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?