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in a reading ability test, with a sample of 100 cases, the mean score is 40 and
the standard deviation is 4.0. Assuming normality, What is the probability that a score will lie below score 46
The label on a can of pineapple slices that the mean carbohydrate content per serving of canned pineapple is less than 50 grams. It may be assumed that the standard deviation of the carbohydrate content is 4 grams. A random sample of forty servings has a mean carbohydrate content of 52.3 grams. Is the company correct in its claim? Use level of significance 0.05.
suppose there are four people to tested in covid 19. let P represent positive N represent negative and Z represent the number of infected persons that occur.Find the random variable Z
In a plant nursery, the owner thinks that the length of seedlings in a box sprayed with a new kind of fertilizer has an average height of 26 cm after three days and a standard deviation of 10 cm. One researcher randomly selected 80 such seedlings and calculated the mean height to be 20 cm. Use a=0.05 to test out whether what the plant nursery owner thinks us correct or not.
A 60N motor winds a cable around a drum. (I) If the cable lifts a 3-ton load of bricks to a height of 12cm in 5 sec, calculate the efficiency of the motor. (II) At what rate is work done against friction?
Use a direct proof to show that the sum of two odd integers is even
A spacecraft takes 200 km after being launched to reach the escape speed from the earth of 11.2km/s. Find the average acceleration in terms of g
Write the lewis structure for the ozone molecule, O3
a. The skeletal structure is
b. Draw the lewis structure
Write the lewis structure for the ozone molecule, O3
The difference of a number and 6 is the same as 5 times the sum of the number and 2. What is the number?
#340153 on Dec 2023