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 387 investors from their customers. suppose that the true proportion of smartphone users is 38%. complete parts a. through c. below.

a. what would the managers expect the shape of the sampling distribution for the sample proportion to be?
b. what would be the mean of this sampling distribution?
c. what would be the standard deviation of the samplingdistribution?

a) Normal

b) Mean = 0.38

c) Standard deviation = 0.0247

Step-by-step explanation:

a) The shape of the sampling distraction is normal because the sampling distribution depends on the mean and standard deviation.

b) The mean of the sampling distribution will be equal to the true proportion of smart phone users.

The true proportion of smart phone users = 38% = 0.38

p = 0.38

c) Standard deviation α = √ pq/n

p = 0.38

q = 1 - p

q = 1 - 0.38

= 0.62

n = 387

α = √ (0.38*0.62)/387

= √0.2356/387

= √0.0006087855

= 0.0247

The standard deviation = 0.0247

a. turk and mcalister

b. howard, mission, and market

c. yes. since streets end some do not cross yet are not parallel to others. example: mcalister and 5th

step-by-step explanation:

parallel lines are lines which do not intersect ever and look a lot like railroad tracks. turk, mcalister and golden gate are examples of these.

intersect are streets which cross each other and a car on one can reach the other. howard, mission, and market intersect with 6th.

skew lines are lines which neither intersect nor are parallel. these lines exist here because some streets end and never intersect another like mcalister and 5th.

the answer is c just got it on ed

step-by-step explanation: