Mathematics, 30.05.2020 00:58 aidanfbussiness

The scores on a math test are normally distributed with a mean of 78 and a standard deviation of 6. The test scores range from 0 to 100. Nineteen students had test scores between 72 and 90. Estimate the number of students who took the test.
About ___ students took the test

Answers: 2

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 19:40

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Answers: 3

Answer

Mathematics, 22.06.2019 00:10

Aof 12 , we to a of 4 to on a .of 4 be ?

Answers: 1

Answer

Mathematics, 22.06.2019 02:00

Hassan bought a package of tofu. the temperature of the tofu was 14° celsius when hassan put the package into the freezer. he left the tofu in the freezer until it reached –19° celsius. which expressions explain how to find the change in temperature, in degrees celsius, of the package of tofu? select three that apply.

Answers: 1

Answer

Mathematics, 22.06.2019 03:40

Anull hypothesis states that the difference between 8 hours of sleep and 3 hours of sleep has no effect on the number of pictures a student will remember during a picture memory interface test (pmit). examining the mit database, an extremely small t-value of 0.1611 is found. this t-value is much smaller than the smallest t-value on the chart for p-value reference. from this information we can: select one: a. accept the null hypothesis because the p-value obtained shows that the difference between the two groups being tested is not statistically significant b. accept the null hypothesis because the p-value obtained was statistically significant c. reject the null hypothesis because of the p-value obtained d. reject the null hypothesis because the data obtained is statistically significant

Answers: 3

Answer

You know the right answer?

The scores on a math test are normally distributed with a mean of 78 and a standard deviation of 6....

Questions

Mathematics, 06.04.2021 22:20

what is the total lateral area of the square pyramid in square inches, 8 inches base and 9 inches height...