uppose 14 children, who were learning to ride two-wheel bikes, were surveyd to determine how long they had to use training whells. It was revealed that they used them an average of six months with a sample standard deviation of three months. Assume the underlying population distribution is normal.
Suppose the marketing company did do a survey. They randomly surveyed 250 households and found that in 169 of them, the woman made the majority of the purchasing decisions. We are interested in the population proportion of households where women make the majority of the purchasing decisions.
Include 3 decimal places in your answer for the following questions.
What is the point estimate for the population proportion?
We are 95% confident that the population proportion of households where women make the majority of the purchasing decisions is between and .