Mathematics, 19.10.2019 00:30 jessikamacadlo8948
An investment website can tell what devices are used to access their site. the site managers wonder whether they should enhance the facilities for trading via smartphones so they want to estimate the proportion of users who access the site that way. they draw a random sample of
131
investors from their customers. suppose that the true proportion of smartphone users is
26
%.
complete parts a) through c) below.
a) what would the managers expect the shape of the sampling distribution for the sample proportion to be?
skewed to the left
unimodal and symmetric
skewed to the right
nonsymmetric
b) what would be the mean of this sampling distribution?
(round to two decimal places as needed.)
c) what would be the standard deviation of the samplingdistribution?
(round to three decimal places as needed.)
Answers: 3
Mathematics, 21.06.2019 14:30
You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )
Answers: 1
Mathematics, 21.06.2019 16:00
What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9
Answers: 2
Mathematics, 21.06.2019 19:30
Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?
Answers: 1
Mathematics, 21.06.2019 21:50
Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?
Answers: 1
An investment website can tell what devices are used to access their site. the site managers wonder...
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