The probability that the proportion of books checked out in a sample of 412 books would differ from the population proportion by less than 4% is P=0.9255.

Step-by-step explanation:

The population's proportion is $\pi=0.29$

If we take a sample of 412 books (n=412), we have a standard deviation of the sampling distribution of:

$\sigma_M=\sqrt{\frac{\pi(1-\pi)}{n}}=\sqrt{\frac{0.29*0.71}{412}}=\sqrt{0.0005} =0.0224$

We have to calculate the probabilty that the sample proportion will be between 0.25 and 0.33.

$z_1=(0.25-0.29)/0.0224=-0.04/0.0224=-1.7857\\\\z_2=1.7857\\\\\\P(0.25$

8 0

4 years ago

Cameron is going to an amusement park. The price of admission into the park is $20, and once he is inside the park, he will have

Artyom0805 [142]

Answer:

If he goes on 7 rides he will play $48

The equation if he goes on r rides is $20+$4r

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Find the percentages. 15m is what percent of 60m; 3m; 30m; 1.5 km?

Mandarinka [93]

15m is:
25% of 60m
500% of 3m
50% of 30m
1000% of 1.5m

5 0

3 years ago

Fiona is serving iced tea and lemonade at a picnic. She has only 44 cups in which to serve the drinks. If x represents the numbe

masha68 [24]

The number of glasses is restricted to 44 cups. So the number of iced tea cups and the number of lemonade cups that she can serve is, maximum, 44. Then, if you call x the number of glasses of iced tea and call y the number of glasses of lemonade, you have that the total number of glasses (cups) is x + y. And <span>the equation that represents the number of glasses that she cacn serve is x + y = 44. You can place it in other equivalent ways, for example, solve for y: y = 44 - x. Those two equations are valid answers because they represent the same equation.</span>

8 0

3 years ago