Questions from Statistics

Q: The percentage of heights between 160 cm and 188 cm

The percentage of heights between 160 cm and 188 cm

Q: The percentage of heights between 180 cm and 200 cm

The percentage of heights between 180 cm and 200 cm

Q: The percentage of heights between 150 cm and 170 cm

The percentage of heights between 150 cm and 170 cm

Q: Consider the following table, showing the official mean weight and estimated

Consider the following table, showing the official mean weight and estimated standard deviation for five U.S coins. Suppose a vending machine is designed to reject all coins with weights more than 2 s...

Q: Lengths of pregnancies are normally distributed with a mean of 268 days

Lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. What percentage of pregnancies last less than 250 days? b. What percentage of pregnancie...

Q: The stack plot in Figure 3.25 shows the numbers of

The stack plot in Figure 3.25 shows the numbers of bachelor’s degrees awarded to males and females since 1970. The last few years are projections. a. Estimate the numbers of bachelor...

Q: Based on data from the College Board, SAT scores on the

Based on data from the College Board, SAT scores on the Math Level 1 test are normally distributed with a mean of 621 and a standard deviation of 96. a. Find the percentage of scores greater than 600...

Q: Assume that the scores on the Graduate Record Exam (GRE

Assume that the scores on the Graduate Record Exam (GRE) are normally distributed with a mean of 497 and a standard deviation of 115. a. A graduate school requires a GRE score of 650 for admission. T...

Q: Assume that body temperatures of healthy adults are normally distributed with a

Assume that body temperatures of healthy adults are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F. a. What percentage of adults have body temperatures greater than 99....

Q: At the district spelling bee, the girls have normally distributed scores

At the district spelling bee, the girls have normally distributed scores with a mean score of 71 points and a standard deviation of 6 those students with a score greater than 75 are eligible to go to...