Select the correct statement a left-tailed hypothesis test is significant at the 0.05 level if the standard score of the sample
mean is less than or equal to z=-1.645
a left-tailed hypothesis test is significant at the 0.05 level if the standard score of the sample
mean is higher than or equal to z=-1.645
a left-tailed hypothesis test is not significant at the 0.05 level if the standard score of the sample
mean is less than or equal to z=-1.645
none of the above

the correct answer is the second option

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

congruent segments

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: