Butterworth, missouri, is trying to increase its tourism, a great source of revenue. among other things, butterworth prides itself on its temperate climate. the tourism department would like to include in its glossy new brochure the middle range of temperatures that occur on 90% of the days there. a check with the national weather service finds that the average temperature in butterworth is 76 degrees with a standard deviation of 5.7 (the temperatures were normally distributed). the tourism department by finding the two temperatures that cut off the middle 90% of temperatures in butterworth.

Is expected that 90% of the time the temperature in Butterworth will be between 66.6 deg F and 85.37 deg F.

Step-by-step explanation:

The middle range of temperatures that occur on 90% of the days (upper limit and lower limit) can be calculated as:

For a 90% interval, z is equal to 1.6449,

Is expected that 90% of the time the temperature in Butterworth will be between 66.6 deg F and 85.37 deg F.

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

i think asking google will you get the answer to that question