Dairy Castle wanted to boost the sales of their "Country Baskets." They thought that it might be helpful to hang posters that picture the item. They recorded the number of Country Baskets sold during lunchtime for one week at their various stores. They repeated the sampling for another week when the poster advertising was used. Assume that the weekly sales are normally distributed. Is there sufficient evidence to say that hanging the posters improved the sales of the Country Baskets? Use a .05 significance level. Store Before After Store Before After1218 215 240 1270 201 2201224 180 220 1282 207 2151236 150 190 1292 195 2191252 180 175 1304 180 195

3 ft

step-by-step explanation:

since the triangle is right use pythagoras' identity to solve for a

the square on the hypotenuse is equal to the sum of the squares on the other two sides, that is

a² + 8² = ( )²

a² + 64 = 73 ( subtract 64 from both sides )

a² = 9 ( take the square root of both sides )

a = = 3

180 square centimeters

step-by-step explanation:

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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