Difference in two sample means

Reference no: EM13109835

Question a: Which of the following conditions must be met to conduct a test for the difference in two sample means?

a. Data must be at least of interval scale

b. Populations must be normal

c. Variances in the two populations must be equal

d. A and B correct

Question b: Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?

a. Reject the null hypothesis

b. Do not reject the null hypothesis

c. Take a larger sample

d. Reserve judgment

Reference no: EM13109835

Questions Cloud

Determine probability of amount of total claims : Claims arrive at random times to the insurance company. Determine the probability that amount of total claims over period of 100 days is at least $150,000.

Find role of mitosis and meiosis in animal and plant growth : Discuss the roles of mitosis and meiosis in animal and plant growth. How do these two processes differ from one another?

Hypothesis testing of standard deviation-new production : A manufacturer uses a new production method to produce steel rods. A random sample of 17 steel rods resulted in lengths with a standard deviation of 21.1cm.

Describe advantages of various methods of data collection : Describe the advantages and disadvantages of the various methods of data collection. Compare and contrast the benefits of using qualitative and quantitative data collection methods as they apply to organizational development (OD).

Difference in two sample means : Which of the following conditions must be met to conduct a test for the difference in two sample means? Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?

Compute karl pearson-s co-efficient of skewnes : The data given shows daily sales at the petrol station. Compute Karl Pearson's co -efficient of skewness. Quantity sold (in litres) and No. of days. are given.

Analyze sample data for time spent going to parties : National data show that, on average, college freshman spend 7.5 hours a week going to parties. President DeRosa doesn't believe that these figures apply at his school; he thinks freshman at his school party less.

Case study - on time technology products : On-Time Technology Products recognizes that they should do more to connect with customers after a sale. Assume you work in the On-Time Technology Products call center in Dayton, Ohio.

Hypothesis testing-consumption of saturated fats : Consumption of Saturated Fat: A nutritionist claims that the proportion of females who consume too much saturated fat is lower than the proportion of males who consume too much saturated fat.

User Account

All Pages