A researcher is interested in estimating the average number of times that shoppers have used the buy-online-pickup-in-store (BOPIS) service in the past 3 months. The following standards have been set by her manager: a confidence level of 95% and an error within 0.5 of a time. Suppose she had no information about the population standard deviation for the variable, but knows that the range for the variable is about 30 times. What is the most appropriate sample size

step-by-step explanation:

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation: