The decimal number 0.75 means:

1 answer:

8 0

The decimal number 0.75 means:

In expanded form it would be written as: (7x/10) + (5x1/100)

In written form it would be written as: 75 hundredths.
Hint: If you were writing this number in written form, always remember that if the number is after the deciml point it has to end with "th" like hundredths ends with "th". If the number is before the decimal point it doesn't end with a "th".

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In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by: