This graph shows the temperature in Mariam’s house between noon and midnight one day. Select ALL of the true statements. There was a four-hour period during which the temperature did not change.
There was a four-hour period during which the temperature did not change.

The lowest temperature occurred between 4:00and
5:00.
The lowest temperature occurred between 4:00and
5:00.

Time is a function of temperature.
Time is a function of temperature.

The temperature was 74° twice during the
12-hour period.
The temperature was 74° twice during the
12-hour period.

The temperature was increasing between 9:00and
10:00.

According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.