School district officials believe that students spend plenty of time reading at home. A teacher wants to convince these officials that, on average, students spend less than 90 minutes per week reading at home. What is the alternative hypothesis?
a. Ha: p < 0.90
b. Ha: p > 0.90
c. Ha: > 90
d. Ha: < 90
School district officials believe that students spend plenty of time reading at home. A teacher wants...
A kindergarten teacher is interested in investigating differences in the amount of time students spend reading for 20 min. free-time period based on the average number of days per week parents reports reading to their children. Children were assigned to groups based on Low Parental Reading (1-2 days per week), Medium Parental Reading (3-4 days per week), or Frequent Parental Reading (5-7 days per week). 1. What is the dependent variable in the study? A. Parental reading group assignment -...
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A researcher wants to test if the elementary school children spend less than 30 minutes per day on homework. Suppose we make the test at the 1% significance level. A sample of 61 children selected from this school shows that they spend an average of 28 minutes per day on home work with a standard deviation of 4 minutes. a.) Write the claim using an appropriate math expression b.) Define the Null and Alternate Hypotheses c.) Find the p-value d.)...
0 pts A large Midwestern university is interested in estimating the mean time that students spend at the student recreation center per week. A previous study indicated that the standard deviation in time is about 25 minutes per week. If the officials wish to estimate the mean time within ± 4 minutes with a 90 percent confidence, what should the sample size be? 106 Can't be determined without the sample mean. 105 105.685
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